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Innospec Inc
(NASDAQ:IOSP) 

IOSP stock logo

Innospec Inc. develops, manufactures, blends, markets, and supplies specialty chemicals in the United States, rest of North America, the United Kingdom, rest of Europe, and internationally. It operates through Fuel Specialties, Performance Chemicals, and Oilfield Services segments. The Fuel Specialt...

Founded: 1938
Full Time Employees: 2,000
Sector: Basic Materials
Industry: Specialty Chemicals

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At a glance:
  • Specialty Chemicals Portfolio with Exposure to Fuel Additives and Performance Chemicals: Innospec operates across fuel specialty additives, performance chemicals, and oilfield services, with results influenced by industrial activity, fuel demand, and regulatory-driven formulation needs.
  • Earnings and Margins Typically Driven by Mix, Pricing, and Input-Cost Volatility: Profitability often depends on product mix and the ability to pass through raw-material and logistics costs, with margin sensitivity to shifts in demand across end markets.
  • Cyclicality and Energy/Industrial End-Market Sensitivity Remain Key Variables: A portion of revenue is tied to cyclical energy and industrial trends; changes in oilfield activity and global manufacturing conditions can impact volumes and operating leverage.
  • Capital Allocation Focus Often Centers on Disciplined Investment and Shareholder Returns: The company has historically emphasized balance-sheet discipline alongside targeted capex, bolt-on M&A potential, and returning capital via buybacks/dividends when feasible.
  • Regulatory and ESG-Related Dynamics Can Be Both Tailwinds and Constraints: Environmental regulations and fuel efficiency/emissions standards can support demand for certain additives, while chemical regulatory compliance and sustainability requirements can raise costs or limit certain chemistries.
Bull Thesis:
  • Diversified & Resilient Business Model: Innospec's balanced portfolio across Fuel Specialties, Performance Chemicals, and Oilfield Services provides stability. The essential demand in the former two segments often offsets the cyclicality inherent in the Oilfield Services business, leading to more consistent overall performance.
  • Strong Free Cash Flow & Shareholder Returns: The company consistently generates robust free cash flow, which enables strategic investments in growth, efficient debt reduction, and attractive shareholder returns through a combination of dividends and share buybacks, enhancing long-term value.
  • Innovation & Sustainability Tailwinds: Innospec is well-positioned to capitalize on the growing global demand for sustainable solutions. Its focus on developing advanced and greener chemistries for applications like biofuels, sustainable personal care products, and cleaner industrial processes aligns with future market trends and regulatory shifts.
  • Effective Pricing Power & Margin Management: Due to the specialized nature of its products and strong, long-standing customer relationships, Innospec demonstrates an ability to effectively pass on raw material cost increases and manage its cost structure, thereby maintaining healthy operating margins even in inflationary environments.
Bear Thesis:
  • Oilfield Services Cyclicality & Volatility: The Oilfield Services segment remains highly sensitive to fluctuations in global oil and gas prices, drilling activity, and capital expenditures by exploration and production (E&P) companies, introducing an element of earnings volatility and unpredictability.
  • Raw Material Cost & Supply Chain Pressures: Persistent inflation or disruptions in key raw material supply chains could compress margins if the company is unable to fully and timely pass on increased costs to customers, or if supply shortages impact production volumes.
  • Increasing Regulatory & Environmental Scrutiny: Stricter global environmental regulations and chemical use policies could necessitate costly product reformulations, limit market access for certain existing products, or increase compliance expenses, potentially impacting profitability and R&D spend.
  • Global Economic Slowdown Impact: A significant downturn in global industrial production or consumer spending could lead to reduced demand across all segments. This would particularly affect Fuel Specialties (lower transportation/industrial activity) and Performance Chemicals (reduced consumer spending on personal/home care), impacting sales volumes and profitability.
Main Competitors:
  • NewMarket Corporation (Afton Chemical) ($NEU) (Fuel and lubricant additives), Directly competes with Innospec's Fuel Specialties segment. Afton Chemical is a leading developer and manufacturer of performance additives for fuels (gasoline, diesel, marine) and lubricants, vying for market share among refiners, fuel marketers, and lubricant blenders globally.
  • Croda International Plc ($CRDA (LSE)) (Specialty ingredients for personal care, health, and crop care), A major competitor in Innospec's Performance Chemicals segment, particularly in personal care ingredients. Croda develops and supplies high-performance, sustainable ingredients for skin care, hair care, sun care, and other consumer applications, directly challenging Innospec's offerings in this space.
  • BASF SE ($BASFY (OTC)) (Chemicals, materials, industrial solutions, nutrition & care), A global chemical giant that competes with Innospec across multiple segments. BASF offers fuel and lubricant additives (competing with Fuel Specialties) and a vast portfolio of ingredients for personal care and home care (competing with Performance Chemicals). Its immense scale, broad product range, and R&D capabilities make it a formidable competitor.
  • Evonik Industries AG ($EVKIF (OTC)) (Specialty chemicals, including ingredients for personal care, nutrition, and industrial applications), Another significant specialty chemicals company that competes with Innospec, particularly in the Performance Chemicals segment. Evonik provides a wide array of innovative ingredients for personal care, home care, and industrial applications, focusing on sustainability and high-performance solutions, similar to Innospec's strategy.
Moat:
Innospec operates in highly competitive specialty chemicals markets. Its competitive moat primarily stems from its deep expertise in specialized chemical formulations, extensive R&D capabilities, and strong technical service that allows it to develop tailored solutions for complex customer needs in fuel additives, personal care, and oilfield chemicals. Navigating stringent regulatory environments and building long-term customer relationships also contribute to its defensibility. However, competition is intense, coming from large diversified chemical companies with vast resources (e.g., BASF) as well as more focused, innovative specialists (e.g., Afton Chemical, Croda). This necessitates continuous innovation, efficient operations, and strategic market positioning to maintain and grow market share.
Income Statements:
Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2002-09-30 
                                                                                                
      net sales
    453,200,000 455,600,000 441,900,000 439,700,000 440,800,000 466,800,000 443,400,000 435,000,000 500,200,000 494,700,000 464,100,000 480,400,000 509,600,000 510,700,000 513,000,000 467,600,000 472,400,000 413,200,000 376,100,000 354,500,000 339,600,000 310,800,000 265,100,000 244,900,000 372,300,000 280,650,000 371,900,000 362,400,000 388,300,000 270,475,000 363,100,000 358,100,000 360,700,000 353,800,000 332,400,000 326,300,000 294,300,000 237,800,000 205,500,000 228,000,000 212,100,000 246,000,000 254,200,000 242,900,000 269,200,000 290,700,000 228,200,000 221,300,000 220,700,000 241,600,000 192,800,000 185,000,000 199,400,000 213,700,000 183,400,000 178,500,000 200,800,000 200,500,000 202,100,000 186,500,000 185,300,000 177,300,000 174,000,000 168,400,000 163,500,000 164,200,000 149,200,000 137,000,000 148,100,000 168,000,000 158,500,000 145,300,000 168,700,000 172,700,000 143,000,000 141,400,000 145,300,000 165,800,000 135,500,000 112,900,000 117,900,000 126,000,000 136,000,000 129,100,000 136,600,000 130,600,000 123,000,000 106,900,000 127,900,000 123,300,000 113,800,000 116,300,000 
      yoy
    2.81% -2.40% -0.34% 1.08% -11.88% -5.64% -4.46% -9.45% -1.84% -3.13% -9.53% 2.74% 7.87% 23.60% 36.40% 31.90% 39.10% 32.95% 41.87% 44.75% -8.78% 10.74% -28.72% -32.42% -4.12% 3.76% 2.42% 1.20% 7.65% -23.55% 9.24% 9.75% 22.56% 48.78% 61.75% 43.11% 38.76% -3.33% -19.16% -6.13% -21.21% -15.38% 11.39% 9.76% 21.98% 20.32% 18.36% 19.62% 10.68% 13.06% 5.13% 3.64% -0.70% 6.58% -9.25% -4.29% 8.36% 13.09% 16.15% 10.75% 13.33% 7.98% 16.62% 22.92% 10.40% -2.26% -5.87% -5.71% -12.21% -2.72% 10.84% 2.76% 16.10% 4.16% 5.54% 25.24% 23.24% 31.59% -0.37% -12.55% -13.69% -3.52% 10.57% 20.77% 6.80% 5.92% 8.08% -8.08%     
      qoq
    -0.53% 3.10% 0.50% -0.25% -5.57% 5.28% 1.93% -13.03% 1.11% 6.59% -3.39% -5.73% -0.22% -0.45% 9.71% -1.02% 14.33% 9.86% 6.09% 4.39% 9.27% 17.24% 8.25% -34.22% 32.66% -24.54% 2.62% -6.67% 43.56% -25.51% 1.40% -0.72% 1.95% 6.44% 1.87% 10.87% 23.76% 15.72% -9.87% 7.50% -13.78% -3.23% 4.65% -9.77% -7.40% 27.39% 3.12% 0.27% -8.65% 25.31% 4.22% -7.22% -6.69% 16.52% 2.75% -11.11% 0.15% -0.79% 8.36% 0.65% 4.51% 1.90% 3.33% 3.00% -0.43% 10.05% 8.91% -7.49% -11.85% 5.99% 9.08% -13.87% -2.32% 20.77% 1.13% -2.68% -12.36% 22.36% 20.02% -4.24% -6.43% -7.35% 5.34% -5.49% 4.59% 6.18% 15.06% -16.42% 3.73% 8.35% -2.15%  
      cost of goods sold
    -329,700,000 -328,200,000 -325,200,000 -316,500,000 -315,700,000 -330,600,000 -319,300,000 -308,100,000 -344,500,000 -339,000,000 -326,900,000 -330,000,000 -361,800,000 -359,100,000 -357,000,000 -327,800,000 -333,100,000 -300,300,000 -263,200,000 -246,200,000 -238,800,000 -219,800,000 -186,400,000 -185,800,000 -258,400,000 -193,650,000 -252,800,000 -251,300,000 -270,500,000 -190,900,000 -252,100,000 -255,300,000 -256,200,000 -245,300,000 -233,600,000 -221,200,000 -203,400,000 -146,400,000 -126,300,000 -142,500,000 -135,900,000 -159,700,000 -163,800,000 -155,400,000 -187,400,000 -196,600,000 -154,600,000 -152,700,000 -155,000,000 -167,000,000 -135,400,000 -125,600,000 -135,600,000 -148,700,000 -132,700,000 -121,800,000 -136,800,000 -142,700,000 -144,400,000 -128,400,000 -131,700,000 -122,400,000 -118,600,000 -113,700,000 -111,300,000 -113,100,000 -102,000,000 -96,200,000 -97,900,000 -117,800,000 -115,100,000 -104,200,000  -118,400,000 -97,400,000 -93,600,000 -95,600,000 -115,100,000 -86,000,000 -71,900,000 -72,400,000 -80,200,000 -90,200,000 -82,400,000 -85,400,000 -78,100,000 -64,900,000 -62,300,000 -69,300,000 -66,900,000 -64,200,000 68,100,000 
      gross profit
    123,500,000 127,400,000 116,700,000 123,200,000 125,100,000 136,200,000 124,100,000 126,900,000 155,700,000 155,700,000 137,200,000 150,400,000 147,800,000 151,600,000 156,000,000 139,800,000 139,300,000 112,900,000 112,900,000 108,300,000 100,800,000 91,000,000 78,700,000 59,100,000 113,900,000 87,000,000 119,100,000 111,100,000 117,800,000 79,575,000 111,000,000 102,800,000 104,500,000 108,500,000 98,800,000 105,100,000 90,900,000 91,400,000 79,200,000 85,500,000 76,200,000 86,300,000 90,400,000 87,500,000 81,800,000 94,100,000 73,600,000 68,600,000 65,700,000 74,600,000 57,400,000 59,400,000 63,800,000 65,000,000 50,700,000 56,700,000 64,000,000 57,800,000 57,700,000 58,100,000 53,600,000 54,900,000 55,400,000 54,700,000 52,200,000 51,100,000 47,200,000 40,800,000 50,200,000 50,200,000 43,400,000 41,100,000 51,700,000 54,300,000 45,600,000 47,800,000 49,700,000 50,700,000 49,500,000 41,000,000 45,500,000 45,800,000 45,800,000 46,700,000 51,200,000 52,500,000 58,100,000 44,600,000 58,600,000 56,400,000 49,600,000 48,200,000 
      yoy
    -1.28% -6.46% -5.96% -2.92% -19.65% -12.52% -9.55% -15.63% 5.35% 2.70% -12.05% 7.58% 6.10% 34.28% 38.18% 29.09% 38.19% 24.07% 43.46% 83.25% -11.50% 4.60% -33.92% -46.80% -3.31% 9.33% 7.30% 8.07% 12.73% -26.66% 12.35% -2.19% 14.96% 18.71% 24.75% 22.92% 19.29% 5.91% -12.39% -2.29% -6.85% -8.29% 22.83% 27.55% 24.51% 26.14% 28.22% 15.49% 2.98% 14.77% 13.21% 4.76% -0.31% 12.46% -12.13% -2.41% 19.40% 5.28% 4.15% 6.22% 2.68% 7.44% 17.37% 34.07% 3.98% 1.79% 8.76% -0.73% -2.90% -7.55% -4.82% -14.02% 4.02% 7.10% -7.88% 16.59% 9.23% 10.70% 8.08% -12.21% -11.13% -12.76% -21.17% 4.71% -12.63% -6.91% 17.14% -7.47%     
      qoq
    -3.06% 9.17% -5.28% -1.52% -8.15% 9.75% -2.21% -18.50% 0.00% 13.48% -8.78% 1.76% -2.51% -2.82% 11.59% 0.36% 23.38% 0.00% 4.25% 7.44% 10.77% 15.63% 33.16% -48.11% 30.92% -26.95% 7.20% -5.69% 48.04% -28.31% 7.98% -1.63% -3.69% 9.82% -5.99% 15.62% -0.55% 15.40% -7.37% 12.20% -11.70% -4.54% 3.31% 6.97% -13.07% 27.85% 7.29% 4.41% -11.93% 29.97% -3.37% -6.90% -1.85% 28.21% -10.58% -11.41% 10.73% 0.17% -0.69% 8.40% -2.37% -0.90% 1.28% 4.79% 2.15% 8.26% 15.69% -18.73% 0.00% 15.67% 5.60% -20.50% -4.79% 19.08% -4.60% -3.82% -1.97% 2.42% 20.73% -9.89% -0.66% 0.00% -1.93% -8.79% -2.48% -9.64% 30.27% -23.89% 3.90% 13.71% 2.90%  
      gross margin %
    27.25% 27.96% 26.41% 28.02% 28.38% 29.18% 27.99% 29.17% 31.13% 31.47% 29.56% 31.31% 29.00% 29.68% 30.41% 29.90% 29.49% 27.32% 30.02% 30.55% 29.68% 29.28% 29.69% 24.13% 30.59% 31.00% 32.02% 30.66% 30.34% 29.42% 30.57% 28.71% 28.97% 30.67% 29.72% 32.21% 30.89% 38.44% 38.54% 37.50% 35.93% 35.08% 35.56% 36.02% 30.39% 32.37% 32.25% 31.00% 29.77% 30.88% 29.77% 32.11% 32.00% 30.42% 27.64% 31.76% 31.87% 28.83% 28.55% 31.15% 28.93% 30.96% 31.84% 32.48% 31.93% 31.12% 31.64% 29.78% 33.90% 29.88% 27.38% 28.29% 30.65% 31.44% 31.89% 33.80% 34.21% 30.58% 36.53% 36.32% 38.59% 36.35% 33.68% 36.17% 37.48% 40.20% 47.24% 41.72% 45.82% 45.74% 43.59% 41.44% 
      operating expenses:
                                                                                                
      selling, general and administrative
    -78,500,000 -69,300,000 -71,900,000 -74,600,000 -69,300,000 -81,100,000 -66,800,000 -73,400,000 -92,700,000 -102,300,000 -83,700,000 -105,600,000 -96,200,000 -96,600,000 -95,800,000 -83,400,000 -84,900,000 -69,700,000 -71,200,000 -62,700,000 -63,600,000 -54,900,000 -54,200,000 -63,500,000 -64,400,000 -53,725,000 -71,200,000 -71,200,000 -72,500,000 -49,450,000 -64,700,000 -65,800,000 -67,300,000 -62,600,000 -60,700,000 -60,900,000 -55,300,000 -56,400,000 -56,100,000 -53,100,000 -43,900,000 -55,100,000 -52,700,000 -50,200,000 -48,700,000 -47,100,000 -42,400,000 -37,700,000 -41,800,000 -42,900,000 -31,800,000 -31,500,000 -35,700,000 -33,700,000 -28,300,000 -27,300,000 -27,800,000 -28,800,000 -72,600,000 -30,500,000 -23,600,000 -33,100,000 -28,200,000 -23,700,000 -26,900,000 -45,200,000 -42,900,000 -28,700,000 -25,700,000 -22,600,000 -31,700,000 -29,100,000  -30,600,000 -23,800,000 -24,400,000 -25,100,000 -34,700,000 -22,200,000 -21,000,000 -21,100,000 -24,200,000 -20,900,000 -25,700,000 -26,800,000 -23,300,000 -22,700,000 -21,000,000 -22,800,000 -19,300,000 -16,600,000 15,900,000 
      research and development
    -13,200,000 -11,000,000 -13,700,000 -13,600,000 -12,700,000 -12,700,000 -11,100,000 -12,200,000 -11,800,000 -8,900,000 -11,600,000 -10,600,000 -10,600,000 -8,400,000 -10,100,000 -10,100,000 -10,100,000 -9,500,000 -10,300,000 -8,600,000 -9,000,000 -6,500,000 -7,700,000 -8,100,000 -8,600,000 -6,750,000 -9,700,000 -8,200,000 -9,100,000 -6,275,000 -8,100,000 -8,700,000 -8,300,000 -7,600,000 -7,900,000 -8,500,000 -7,400,000 -5,800,000 -6,500,000 -6,200,000 -6,900,000 -6,000,000 -6,600,000 -6,500,000 -6,200,000 -4,900,000 -6,000,000 -5,600,000 -5,700,000 -4,600,000 -5,700,000 -5,300,000 -5,600,000 -5,200,000 -4,800,000 -5,000,000 -4,600,000 -4,600,000 -4,700,000 -4,700,000 -4,300,000 -4,600,000 -4,500,000 -4,500,000 -4,000,000 -5,000,000 -4,200,000 -4,000,000 -3,200,000 -3,700,000 -3,500,000 -3,900,000  -3,700,000 -3,300,000 -3,400,000 -3,200,000 -2,800,000 -3,100,000 -2,700,000 -2,500,000 -2,200,000 -2,700,000 -3,100,000 -3,200,000 -2,600,000 -2,500,000 -2,500,000 -1,300,000 -1,200,000 -1,400,000 1,400,000 
      adjustment to fair value of contingent consideration
    4,700,000 -300,000 17,700,000 -800,000 -700,000 -1,300,000 -700,000 -600,000 -800,000                             3,100,000 2,300,000 2,400,000 1,600,000 9,100,000 8,500,000 26,600,000 -3,500,000                                                
      profit on disposal of property, plant and equipment
       100,000 100,000 50,000 100,000  100,000                                                                                    
      total operating expenses
    -87,000,000 -80,600,000 -110,800,000 -88,900,000 -82,600,000 -95,100,000 -78,500,000 -86,200,000 -105,200,000 -111,200,000 -95,300,000 -116,200,000 -106,800,000 -105,000,000 -105,900,000 -93,500,000 -95,000,000 -77,400,000 -81,500,000 -71,300,000 -72,600,000 -61,600,000 -61,900,000 -112,500,000 -73,000,000 -60,475,000 -80,900,000 -79,400,000 -81,600,000 -56,925,000 -77,600,000 -74,500,000 -75,600,000 -70,100,000 -68,600,000 -70,400,000 -64,500,000 -59,100,000 -60,300,000 -56,900,000 -50,600,000 -52,000,000 -49,200,000 -30,100,000 -58,400,000 -50,100,000 -48,400,000 -43,300,000 -47,700,000 -48,000,000 -37,900,000 -37,100,000 -41,600,000 -39,200,000 -33,400,000 -32,600,000 -32,800,000 -34,300,000 -77,900,000 -35,700,000                                 
      operating income
    36,500,000 46,800,000 5,900,000 34,300,000 42,500,000 41,100,000 45,600,000 40,700,000 50,500,000 44,500,000 41,900,000 34,200,000 41,000,000 46,600,000 50,100,000 46,300,000 44,300,000 35,500,000 31,400,000 37,000,000 28,200,000 29,400,000 16,800,000 -53,400,000 40,900,000 26,525,000 38,200,000 31,700,000 36,200,000 22,650,000 33,400,000 28,300,000 28,900,000 38,400,000 30,200,000 34,700,000 26,400,000 32,300,000 18,900,000 28,600,000 25,600,000 34,300,000 41,200,000 57,400,000 23,400,000 44,000,000 25,200,000 25,300,000 18,000,000 26,600,000 19,500,000 22,300,000 22,200,000 25,800,000 17,300,000 24,100,000 31,200,000 23,500,000 -20,200,000 22,400,000 23,900,000 15,200,000 20,900,000 24,800,000 11,300,000 -1,900,000 -1,700,000 6,100,000 18,200,000 22,000,000 4,700,000 4,400,000 12,500,000 8,650,000 10,600,000 10,800,000 13,200,000 1,600,000 19,800,000 3,900,000 6,600,000 -300,000 1,000,000 -99,200,000 800,000 19,300,000 12,500,000 12,800,000 27,300,000 31,000,000 20,900,000 25,400,000 
      yoy
    -14.12% 13.87% -87.06% -15.72% -15.84% -7.64% 8.83% 19.01% 23.17% -4.51% -16.37% -26.13% -7.45% 31.27% 59.55% 25.14% 57.09% 20.75% 86.90% -169.29% -31.05% 10.84% -56.02% -268.45% 12.98% 17.11% 14.37% 12.01% 25.26% -41.02% 10.60% -18.44% 9.47% 18.89% 59.79% 21.33% 3.13% -5.83% -54.13% -50.17% 9.40% -22.05% 63.49% 126.88% 30.00% 65.41% 29.23% 13.45% -18.92% 3.10% 12.72% -7.47% -28.85% 9.79% -185.64% 7.59% 30.54% 54.61% -196.65% -9.68% 111.50% -900.00% -1329.41% 306.56% -37.91% -108.64% -136.17% 38.64% 45.60% 154.34% -55.66% -59.26% -5.30% 440.63% -46.46% 176.92% 100.00% -633.33% 1880.00% -103.93% 725.00% -101.55% -92.00% -875.00% -97.07% -37.74% -40.19% -49.61%     
      qoq
    -22.01% 693.22% -82.80% -19.29% 3.41% -9.87% 12.04% -19.41% 13.48% 6.21% 22.51% -16.59% -12.02% -6.99% 8.21% 4.51% 24.79% 13.06% -15.14% 31.21% -4.08% 75.00% -131.46% -230.56% 54.19% -30.56% 20.50% -12.43% 59.82% -32.19% 18.02% -2.08% -24.74% 27.15% -12.97% 31.44% -18.27% 70.90% -33.92% 11.72% -25.36% -16.75% -28.22% 145.30% -46.82% 74.60% -0.40% 40.56% -32.33% 36.41% -12.56% 0.45% -13.95% 49.13% -28.22% -22.76% 32.77% -216.34% -190.18% -6.28% 57.24% -27.27% -15.73% 119.47% -694.74% 11.76% -127.87% -66.48% -17.27% 368.09% 6.82% -64.80% 44.51% -18.40% -1.85% -18.18% 725.00% -91.92% 407.69% -40.91% -2300.00% -130.00% -101.01% -12500.00% -95.85% 54.40% -2.34% -53.11% -11.94% 48.33% -17.72%  
      operating margin %
    8.05% 10.27% 1.34% 7.80% 9.64% 8.80% 10.28% 9.36% 10.10% 9.00% 9.03% 7.12% 8.05% 9.12% 9.77% 9.90% 9.38% 8.59% 8.35% 10.44% 8.30% 9.46% 6.34% -21.80% 10.99% 9.45% 10.27% 8.75% 9.32% 8.37% 9.20% 7.90% 8.01% 10.85% 9.09% 10.63% 8.97% 13.58% 9.20% 12.54% 12.07% 13.94% 16.21% 23.63% 8.69% 15.14% 11.04% 11.43% 8.16% 11.01% 10.11% 12.05% 11.13% 12.07% 9.43% 13.50% 15.54% 11.72% -10.00% 12.01% 12.90% 8.57% 12.01% 14.73% 6.91% -1.16% -1.14% 4.45% 12.29% 13.10% 2.97% 3.03% 7.41% 5.01% 7.41% 7.64% 9.08% 0.97% 14.61% 3.45% 5.60% -0.24% 0.74% -76.84% 0.59% 14.78% 10.16% 11.97% 21.34% 25.14% 18.37% 21.84% 
      other income
    2,600,000 1,600,000 3,400,000 -5,100,000 -500,000 9,500,000 -3,500,000 900,000 2,700,000 -700,000 4,800,000 2,700,000 3,700,000 -1,400,000 -900,000 -3,600,000 4,300,000 -2,400,000 -200,000 3,400,000 3,000,000  3,800,000 100,000 3,900,000 200,000 1,000,000  4,100,000   3,000,000 2,500,000                                               1,600,000 100,000 -2,375,000 -9,800,000 -3,000,000 3,300,000 -3,100,000 1,600,000      
      interest income
    800,000 1,900,000 2,200,000 2,700,000 2,400,000 2,400,000 2,700,000 2,100,000 2,100,000 1,500,000 800,000  300,000                                 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 200,000 200,000 100,000 200,000 100,000 200,000 100,000 200,000 100,000 100,000 100,000 100,000 100,000  100,000 100,000 200,000 300,000 400,000               100,000 200,000 100,000 100,000 -100,000 
      income before income tax expense
    39,900,000 50,300,000 11,500,000 31,900,000 44,400,000 -102,600,000 44,800,000 43,700,000 55,300,000 45,300,000 47,500,000 36,600,000 45,000,000 45,200,000 48,900,000 42,300,000 48,200,000 32,700,000 30,800,000 40,100,000 30,800,000 29,100,000 20,200,000 -53,800,000 44,200,000 26,775,000 37,800,000 30,500,000 38,800,000                                                                
      income tax expense
    -9,100,000 -2,900,000 1,400,000 -8,400,000 -11,600,000 32,200,000 -11,400,000 -12,500,000 -13,900,000 -7,500,000 -8,300,000 -7,700,000 -11,800,000 -19,700,000 -10,200,000 -10,000,000 -11,700,000 -8,800,000 -7,400,000  -7,400,000 -6,500,000 -7,500,000  -11,100,000 -6,500,000 -7,700,000 -8,200,000 -10,100,000                                                                
      net income
    30,800,000 47,400,000 12,900,000 23,500,000 32,800,000 -70,400,000 33,400,000 31,200,000 41,400,000 37,800,000 39,200,000 28,900,000 33,200,000 25,500,000 38,700,000 32,300,000 36,500,000 23,900,000 23,400,000 22,400,000 23,400,000 22,600,000 12,700,000 -39,700,000 33,100,000 31,100,000 30,100,000 22,300,000 28,700,000 20,400,000 20,600,000 21,800,000 22,200,000 -4,800,000 23,300,000 26,100,000 17,200,000 22,100,000 11,400,000 28,900,000 18,900,000 31,500,000 35,600,000 34,500,000 17,900,000 27,900,000 20,800,000 18,500,000 16,900,000 28,700,000 14,000,000 17,100,000 18,000,000 12,700,000 15,500,000 15,500,000 24,600,000 19,600,000 -16,800,000 24,600,000 21,500,000 24,300,000 30,000,000 12,000,000 7,400,000 -300,000 -2,700,000 3,000,000 6,400,000   800,000 7,300,000 4,600,000 5,600,000 6,800,000 6,000,000 -700,000 10,500,000 1,000,000 600,000 -7,400,000 -9,100,000 -104,800,000 -2,400,000 9,100,000 3,200,000 7,200,000 12,900,000 18,400,000 9,600,000 18,300,000 
      yoy
    -6.10% -167.33% -61.38% -24.68% -20.77% -286.24% -14.80% 7.96% 24.70% 48.24% 1.29% -10.53% -9.04% 6.69% 65.38% 44.20% 55.98% 5.75% 84.25% -156.42% -29.31% -27.33% -57.81% -278.03% 15.33% 52.45% 46.12% 2.29% 29.28% -525.00% -11.59% -16.48% 29.07% -121.72% 104.39% -9.69% -8.99% -29.84% -67.98% -16.23% 5.59% 12.90% 71.15% 86.49% 5.92% -2.79% 48.57% 8.19% -6.11% 125.98% -9.68% 10.32% -26.83% -35.20% -192.26% -36.99% 14.42% -19.34% -156.00% 105.00% 190.54% -8200.00% -1211.11% 300.00% 15.63%   275.00% -12.33%   -88.24% 21.67% -757.14% -46.67% 580.00% 900.00% -90.54% -215.38% -100.95% -125.00% -181.32% -384.38% -1555.56% -118.60% -50.54% -66.67% -60.66%     
      qoq
    -35.02% 267.44% -45.11% -28.35% -146.59% -310.78% 7.05% -24.64% 9.52% -3.57% 35.64% -12.95% 30.20% -34.11% 19.81% -11.51% 52.72% 2.14% 4.46% -4.27% 3.54% 77.95% -131.99% -219.94% 6.43% 3.32% 34.98% -22.30% 40.69% -0.97% -5.50% -1.80% -562.50% -120.60% -10.73% 51.74% -22.17% 93.86% -60.55% 52.91% -40.00% -11.52% 3.19% 92.74% -35.84% 34.13% 12.43% 9.47% -41.11% 105.00% -18.13% -5.00% 41.73% -18.06% 0.00% -36.99% 25.51% -216.67% -168.29% 14.42% -11.52% -19.00% 150.00% 62.16% -2566.67% -88.89% -190.00% -53.13%    -89.04% 58.70% -17.86% -17.65% 13.33% -957.14% -106.67% 950.00% 66.67% -108.11% -18.68% -91.32% 4266.67% -126.37% 184.38% -55.56% -44.19% -29.89% 91.67% -47.54%  
      net income margin %
    6.80% 10.40% 2.92% 5.34% 7.44% -15.08% 7.53% 7.17% 8.28% 7.64% 8.45% 6.02% 6.51% 4.99% 7.54% 6.91% 7.73% 5.78% 6.22% 6.32% 6.89% 7.27% 4.79% -16.21% 8.89% 11.08% 8.09% 6.15% 7.39% 7.54% 5.67% 6.09% 6.15% -1.36% 7.01% 8.00% 5.84% 9.29% 5.55% 12.68% 8.91% 12.80% 14.00% 14.20% 6.65% 9.60% 9.11% 8.36% 7.66% 11.88% 7.26% 9.24% 9.03% 5.94% 8.45% 8.68% 12.25% 9.78% -8.31% 13.19% 11.60% 13.71% 17.24% 7.13% 4.53% -0.18% -1.81% 2.19% 4.32% 0% 0% 0.55% 4.33% 2.66% 3.92% 4.81% 4.13% -0.42% 7.75% 0.89% 0.51% -5.87% -6.69% -81.18% -1.76% 6.97% 2.60% 6.74% 10.09% 14.92% 8.44% 15.74% 
      less: net income attributable to noncontrolling interests
    -400,000                                                                                            
      net income attributable to innospec
    30,400,000                                                                                            
      earnings per share:
                                                                                                
      basic
    1.23 1.91 0.52 0.94 1.31 -2.82 1.34 1.25 1.66 1.52 1.58 1.16 1.34 1.03 1.56 1.3 1.47 0.97 0.95 0.91 0.95 0.92 0.52 -1.62 1.35 0.828 1.23 0.91 1.17 0.663 0.84 0.89 0.91 -0.2 0.97 1.08 0.71 0.92 0.48 1.21 0.79 1.32 1.48 1.43 0.74 1.15 0.85 0.76 0.69 1.2 0.59 0.73 0.77 0.55 0.67 0.67 1.07 0.83 -0.71 1.04 0.91 1.02 1.26 0.5 0.31 -0.01 -0.11 0.13 0.27   0.03 0.31 0.193 0.23 0.28 0.5 -0.06 0.88 0.08 0.05 -2.35 -0.74 -8.46 -0.19 0.73 0.26 0.59 0.818 1.54 0.81 1.54 
      diluted
    1.22 1.91 0.52 0.94 1.31 -2.8 1.33 1.24 1.65 1.51 1.57 1.16 1.33 1.02 1.55 1.29 1.46 0.97 0.94 0.9 0.94 0.91 0.51 -1.62 1.34 0.82 1.22 0.9 1.17 0.658 0.84 0.89 0.9 -0.19 0.95 1.06 0.7 0.91 0.47 1.18 0.77 1.29 1.45 1.4 0.72 1.12 0.83 0.75 0.69 1.18 0.58 0.71 0.75 0.53 0.65 0.65 1.03 0.8 -0.71 0.88 0.99 1.2 0.48 0.3 -0.01 -0.11 0.12 0.26   0.03 0.3 0.185 0.23 0.27 0.47 -0.05 0.84 0.08 0.05 -2.35 -0.74 -8.46 -0.19 0.7 0.25 0.56 0.778 1.47 0.77 1.44 
      weighted-average shares outstanding
                                                                                                
      basic
    24,776 24,880 24,834 24,937 24,970 24,932 24,941 24,937 24,893 24,851 24,866 24,868 24,801 24,787 24,786 24,805 24,791 24,647 24,643 24,628 24,601 24,563 24,570 24,564 24,529  24,491 24,483 24,437  24,419 24,409 24,369 24,148 24,137 24,133 24,087 23,998 23,977 23,973 24,019 24,107 24,121 24,202 24,301 24,391 24,420 24,401 24,362 23,651 23,621 23,528 23,404 23,187 23,240 23,147 23,055 23,568 23,711 23,726 23,655 23,756 23,805 23,781 23,682 23,642 23,663 23,639 23,603 23,595 23,596,000,000 23,505 23,680 23,920,000,000 24,007 24,002 11,897  11,900 12,191 12,329  12,359 12,389 12,385 12,445 12,405 12,176  11,942 11,906 11,851 
      diluted
    24,844 24,993 24,909 25,042 25,102 25,119 25,101 25,097 25,066 25,022 25,006 24,980 24,962 24,982 24,965 24,971 24,956 24,854 24,864 24,869 24,840 24,779 24,720 24,564 24,742  24,715 24,678 24,594  24,597 24,591 24,574 24,486 24,565 24,555 24,527 24,442 24,476 24,443 24,483 24,612 24,611 24,671 24,808 24,878 24,915 24,672 24,635 24,156 24,096 24,057 24,015 23,850 23,923 23,894 23,823 24,520 23,711 24,519 24,461 24,814 25,002 25,005 24,883 24,714 23,663 24,600 24,564 24,391 23,596,000,000 24,130 24,357 24,838,000,000 24,646 24,875 12,646  12,498 12,794 12,866  12,359 12,389 12,385 13,071 13,053 12,964  12,559 12,460 12,651 
      restructuring charge
      -900,000                   -200,000  -21,100,000      -2,300,000 -4,800,000                  -200,000      -100,000  -100,000     -200,000  -300,000 -8,200,000 -1,100,000  -400,000 -1,300,000 -200,000 -300,000 -1,100,000  -100,000 -900,000 -1,300,000 -700,000 -1,100,000 -400,000 -2,100,000 -900,000 -6,200,000 -10,600,000 -12,100,000 -2,400,000 -1,200,000 -1,800,000 -2,500,000 -4,500,000 -2,300,000 -8,200,000 3,100,000 
      impairment of property, plant and equipment
      -22,900,000                                                                                          
      impairment of intangible assets
      -19,100,000                     -19,800,000                                                                     
      interest expense
               -300,000   -300,000 -400,000 -400,000 -400,000 -400,000 -300,000 -400,000 -300,000 -400,000 -500,000 -600,000 -700,000 -1,400,000 -1,200,000 -1,500,000 -1,600,000 -1,800,000 -1,800,000 -1,700,000 -1,900,000 -2,100,000 -2,000,000 -2,200,000 -1,000,000 -700,000 -700,000 -800,000 -1,100,000 -1,000,000 -900,000 -1,000,000 -1,000,000 -900,000 -900,000 -1,000,000 -900,000 -500,000 -500,000 -400,000 -500,000 -400,000 -500,000 -400,000 -1,100,000 -800,000 -1,000,000 -1,000,000 -1,300,000 -1,300,000 -1,200,000 -1,300,000 -1,400,000 -1,500,000 -1,700,000 -1,700,000 -1,500,000 -1,600,000 -1,600,000  -4,500,000 -2,300,000 -1,100,000 -1,600,000 -7,000,000 -1,700,000 -2,000,000 -1,400,000 -4,000,000 -1,900,000 -1,900,000 -1,700,000 -1,500,000 -1,400,000 -1,500,000 -4,300,000 -4,000,000 -2,200,000 2,100,000 
      income tax (expense)/credit
                       -17,700,000                                                                         
      income tax credit/
                           14,100,000                                                                     
      loss on disposal of subsidiary
                                     -250,000  -1,000,000     -1,400,000                                                    
      foreign exchange loss on liquidation of subsidiary
                                        -1,800,000                                                        
      other (expense)/income
                                 1,075,000 -1,200,000                                                              
      income before income taxes
                                 42,000,000 30,400,000 29,500,000 29,700,000 40,200,000 29,900,000 34,800,000 23,200,000 29,000,000 13,200,000 36,400,000 24,500,000 35,200,000 41,400,000 51,800,000 23,900,000 42,700,000 25,400,000 23,800,000 19,000,000 30,700,000 18,300,000 20,900,000 22,900,000 26,700,000 17,000,000 19,500,000 32,000,000 20,000,000 -25,200,000 29,500,000 28,300,000 16,500,000 31,300,000 12,900,000 10,000,000 100,000 4,000,000 4,700,000 9,500,000   1,800,000 11,700,000 8,125,000 9,600,000 11,200,000 11,700,000 3,600,000 19,400,000 3,500,000 5,300,000 -5,500,000 -10,900,000 -104,100,000 2,400,000 14,700,000 11,800,000 12,400,000 18,700,000 26,800,000 16,500,000 23,700,000 
      income taxes
                                 -21,600,000 -9,800,000 -7,700,000 -7,500,000 -45,000,000 -6,600,000 -8,700,000 -6,000,000 -6,900,000 -1,800,000 -7,500,000 -5,600,000 -3,700,000 -5,800,000 -17,300,000 -6,000,000 -14,800,000 -4,600,000 -5,300,000 -2,100,000 -2,000,000 -4,300,000 -3,800,000 -4,900,000 -14,000,000 -1,500,000 -4,000,000 -7,400,000 -400,000 8,400,000 -4,900,000 -6,800,000 7,800,000 -1,300,000 -900,000 -2,600,000 -400,000 -6,700,000 -1,700,000 -3,100,000 -2,000,000 1,100,000 -1,000,000  -4,100,000 -4,000,000 -4,400,000 -5,700,000 -4,300,000 -8,900,000 -2,500,000 -4,700,000 -500,000 1,800,000 -700,000 -4,800,000 -5,600,000 -8,600,000 -4,200,000 -5,800,000 -8,700,000 -4,200,000 5,400,000 
      other net income
                                     725,000 1,800,000 2,100,000    8,500,000 -300,000 -500,000 1,200,000 -4,700,000 1,500,000 -400,000 1,000,000 -700,000      1,300,000 -100,000 -4,300,000 1,100,000 -2,600,000 -4,300,000 7,900,000 5,300,000 2,400,000 11,600,000 -10,800,000  75,000 7,100,000 300,000 -7,100,000    500,000 750,000 1,400,000 1,500,000 100,000 3,700,000 1,400,000              
      other net expense
                                        -1,000,000                            -100,000                            
      profit/(loss) on disposal of subsidiary
                                         -350,000                                                       
      other net (expense)/income
                                         800,000 -5,000,000                               -13,500,000 -5,000,000 -1,300,000                     
      profit on disposal of subsidiary
                                              1,600,000                                                  
      impairment of octane additives segment goodwill
                                                     -300,000 -400,000 -300,000 -300,000 -300,000 -300,000 -300,000 -300,000 -300,000 -600,000 -500,000                                 
      other net income/
                                                    1,900,000 4,900,000 -800,000 -1,000,000 1,000,000                                   2,000,000     
      profit on disposal
                                                          100,000       -100,000  200,000      100,000  400,000                     
      amortization of intangible assets
                                                                -1,200,000 -1,200,000 -1,200,000 -1,100,000 -1,200,000 -1,200,000 -1,200,000 -1,100,000 -1,200,000 -1,200,000 -2,100,000 -2,000,000  -4,600,000 -4,600,000 -4,600,000 -3,100,000 -3,200,000 -3,200,000 -3,200,000 -3,100,000 -3,200,000 -3,200,000 -3,100,000 -3,200,000 -2,500,000 -2,600,000 -2,400,000   -2,500,000 2,400,000 
      impairment of octane additives business goodwill
                                                                -600,000 -500,000 -600,000 -500,000 -600,000 -500,000 -600,000 -500,000 -600,000 -500,000 -1,100,000 -1,000,000  -2,000,000 -2,400,000 -3,300,000 -4,400,000 -7,300,000 -10,400,000 -7,700,000 -11,300,000            
      operating expenses
                                                                                                
      earnings per share
                                                                                                
      basic
    1.23 1.91 0.52 0.94 1.31 -2.82 1.34 1.25 1.66 1.52 1.58 1.16 1.34 1.03 1.56 1.3 1.47 0.97 0.95 0.91 0.95 0.92 0.52 -1.62 1.35 0.828 1.23 0.91 1.17 0.663 0.84 0.89 0.91 -0.2 0.97 1.08 0.71 0.92 0.48 1.21 0.79 1.32 1.48 1.43 0.74 1.15 0.85 0.76 0.69 1.2 0.59 0.73 0.77 0.55 0.67 0.67 1.07 0.83 -0.71 1.04 0.91 1.02 1.26 0.5 0.31 -0.01 -0.11 0.13 0.27   0.03 0.31 0.193 0.23 0.28 0.5 -0.06 0.88 0.08 0.05 -2.35 -0.74 -8.46 -0.19 0.73 0.26 0.59 0.818 1.54 0.81 1.54 
      diluted
    1.22 1.91 0.52 0.94 1.31 -2.8 1.33 1.24 1.65 1.51 1.57 1.16 1.33 1.02 1.55 1.29 1.46 0.97 0.94 0.9 0.94 0.91 0.51 -1.62 1.34 0.82 1.22 0.9 1.17 0.658 0.84 0.89 0.9 -0.19 0.95 1.06 0.7 0.91 0.47 1.18 0.77 1.29 1.45 1.4 0.72 1.12 0.83 0.75 0.69 1.18 0.58 0.71 0.75 0.53 0.65 0.65 1.03 0.8 -0.71 0.88 0.99 1.2 0.48 0.3 -0.01 -0.11 0.12 0.26   0.03 0.3 0.185 0.23 0.27 0.47 -0.05 0.84 0.08 0.05 -2.35 -0.74 -8.46 -0.19 0.7 0.25 0.56 0.778 1.47 0.77 1.44 
      dividend declared per common share:
                                                                                                
      dividend declared per common share
                                                                        0.05 -99,999.9 50,000  0.05 0.023 0.045  0.09                
      (loss)/income before income taxes and minority interest
                                                                         2,950,000 -1,700,000                      
      minority interest
                                                                              -100,000    -100,000    -200,000    -900,000 -1,000,000 -1,700,000 -900,000 -800,000 500,000 
      (loss)/income before income taxes
                                                                         2,950,000 -1,700,000                      
      net (loss)/income
                                                                         1,875,000 -600,000                      
      basic
                                                                         80,000 -30,000                      
      diluted
                                                                         77,500 -30,000                      
      profit on disposals
                                                                                  9,600,000              
      income before income taxes and minority interest
                                                                             8,150,000 9,700,000   3,600,000 19,500,000   -5,500,000 -10,700,000 -104,100,000 2,400,000 14,700,000 12,700,000 13,400,000 20,400,000 27,700,000 17,300,000 24,200,000 
      prepaid disposal costs
                                                                                   -400,000             
      income from continuing operations
                                                                                 3,025,000 10,500,000 1,000,000 600,000 -29,075,000 -9,100,000 -104,800,000 -2,400,000 9,100,000 3,200,000 8,200,000 10,225,000 18,100,000 12,300,000  
      discontinued operations, net of tax
                                                                                           -1,000,000   -3,300,000  
      earnings per share—net income
                                                                                                
      basic
    1.23 1.91 0.52 0.94 1.31 -2.82 1.34 1.25 1.66 1.52 1.58 1.16 1.34 1.03 1.56 1.3 1.47 0.97 0.95 0.91 0.95 0.92 0.52 -1.62 1.35 0.828 1.23 0.91 1.17 0.663 0.84 0.89 0.91 -0.2 0.97 1.08 0.71 0.92 0.48 1.21 0.79 1.32 1.48 1.43 0.74 1.15 0.85 0.76 0.69 1.2 0.59 0.73 0.77 0.55 0.67 0.67 1.07 0.83 -0.71 1.04 0.91 1.02 1.26 0.5 0.31 -0.01 -0.11 0.13 0.27   0.03 0.31 0.193 0.23 0.28 0.5 -0.06 0.88 0.08 0.05 -2.35 -0.74 -8.46 -0.19 0.73 0.26 0.59 0.818 1.54 0.81 1.54 
      diluted
    1.22 1.91 0.52 0.94 1.31 -2.8 1.33 1.24 1.65 1.51 1.57 1.16 1.33 1.02 1.55 1.29 1.46 0.97 0.94 0.9 0.94 0.91 0.51 -1.62 1.34 0.82 1.22 0.9 1.17 0.658 0.84 0.89 0.9 -0.19 0.95 1.06 0.7 0.91 0.47 1.18 0.77 1.29 1.45 1.4 0.72 1.12 0.83 0.75 0.69 1.18 0.58 0.71 0.75 0.53 0.65 0.65 1.03 0.8 -0.71 0.88 0.99 1.2 0.48 0.3 -0.01 -0.11 0.12 0.26   0.03 0.3 0.185 0.23 0.27 0.47 -0.05 0.84 0.08 0.05 -2.35 -0.74 -8.46 -0.19 0.7 0.25 0.56 0.778 1.47 0.77 1.44 
      earnings per share—continuing operations
                                                                                                
      earnings per share- continuing operations
                                                                                                
      earnings per share – net income
                                                                                                
      basic
    1.23 1.91 0.52 0.94 1.31 -2.82 1.34 1.25 1.66 1.52 1.58 1.16 1.34 1.03 1.56 1.3 1.47 0.97 0.95 0.91 0.95 0.92 0.52 -1.62 1.35 0.828 1.23 0.91 1.17 0.663 0.84 0.89 0.91 -0.2 0.97 1.08 0.71 0.92 0.48 1.21 0.79 1.32 1.48 1.43 0.74 1.15 0.85 0.76 0.69 1.2 0.59 0.73 0.77 0.55 0.67 0.67 1.07 0.83 -0.71 1.04 0.91 1.02 1.26 0.5 0.31 -0.01 -0.11 0.13 0.27   0.03 0.31 0.193 0.23 0.28 0.5 -0.06 0.88 0.08 0.05 -2.35 -0.74 -8.46 -0.19 0.73 0.26 0.59 0.818 1.54 0.81 1.54 
      diluted
    1.22 1.91 0.52 0.94 1.31 -2.8 1.33 1.24 1.65 1.51 1.57 1.16 1.33 1.02 1.55 1.29 1.46 0.97 0.94 0.9 0.94 0.91 0.51 -1.62 1.34 0.82 1.22 0.9 1.17 0.658 0.84 0.89 0.9 -0.19 0.95 1.06 0.7 0.91 0.47 1.18 0.77 1.29 1.45 1.4 0.72 1.12 0.83 0.75 0.69 1.18 0.58 0.71 0.75 0.53 0.65 0.65 1.03 0.8 -0.71 0.88 0.99 1.2 0.48 0.3 -0.01 -0.11 0.12 0.26   0.03 0.3 0.185 0.23 0.27 0.47 -0.05 0.84 0.08 0.05 -2.35 -0.74 -8.46 -0.19 0.7 0.25 0.56 0.778 1.47 0.77 1.44 
      impairment of tel business goodwill
                                                                                     -31,025,000 -7,400,000 -101,900,000 -14,800,000 -3,600,000 -16,000,000 -3,400,000     
      share of affiliated company earnings
                                                                                             300,000 600,000  
      cumulative effect of change in accounting principle, net of tax
                                                                                            125,000    
      earnings per share - continuing operations
                                                                                                
      earnings per share—income from continuing operations
                                                                                                
      dividends per share
                                                                                           0.06     
      amortization of intangible asset
                                                                                            -1,925,000 -2,600,000   
      other net income/expenses
                                                                                            -400,000 600,000   
      earnings per share— continuing operations
                                                                                                
      other expenses
                                                                                              -1,500,000  
      amortization of goodwill
                                                                                                
      other expenses/
                                                                                               -800,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 2003-09-30 2003-06-30 2002-09-30 
                                                                                                 
        assets
                                                                                                 
        current assets:
                                                                                                 
        cash and cash equivalents
      289,100,000 292,500,000 270,800,000 266,600,000 299,800,000 289,200,000 303,800,000 240,200,000 270,100,000 203,700,000 207,200,000 165,900,000 147,500,000 147,100,000 100,500,000 71,400,000 105,600,000 141,800,000 89,200,000 94,400,000 117,000,000 105,300,000 66,600,000 58,200,000 68,100,000 75,700,000 110,300,000 106,100,000 123,500,000 123,100,000 91,400,000 66,000,000 78,100,000 90,200,000 65,500,000 48,800,000 45,400,000 101,900,000 167,100,000 153,200,000 113,400,000 136,900,000 127,700,000 64,300,000 46,500,000 41,600,000 90,400,000 91,400,000 90,100,000 80,200,000 53,900,000 54,700,000 43,200,000 22,400,000 129,600,000 105,800,000 91,200,000 76,200,000 132,100,000 99,000,000 89,900,000 107,100,000 98,800,000 73,700,000 64,200,000 68,600,000 50,200,000 44,500,000 35,500,000 13,900,000 15,200,000 16,400,000 14,100,000 24,300,000 34,800,000 34,700,000 101,900,000 91,900,000 65,800,000 59,700,000 68,900,000 64,600,000 28,000,000 45,600,000 34,800,000 78,300,000 67,900,000 46,100,000 44,100,000 28,700,000 31,000,000 
        trade and other accounts receivable
      354,200,000 342,300,000 349,500,000 336,100,000 343,500,000 341,700,000 327,600,000 300,300,000 318,200,000 359,800,000 305,200,000 310,900,000 342,400,000 334,600,000 342,500,000 339,900,000 337,700,000 284,500,000 302,800,000 281,600,000 247,900,000 221,400,000 206,200,000 213,400,000 296,300,000 292,000,000 296,500,000 280,000,000 296,700,000 279,700,000 287,800,000 277,200,000 280,300,000 244,500,000 245,600,000 241,600,000 219,300,000 154,400,000 125,500,000 136,900,000 146,400,000 137,400,000 130,200,000 131,500,000 147,700,000 164,300,000 117,300,000 118,000,000 122,000,000 135,800,000 113,000,000 86,700,000 97,500,000 115,700,000 93,400,000 95,500,000 100,000,000 99,400,000 92,200,000 96,800,000                                
        inventories
                                                                                                 
        finished goods
      225,600,000 226,300,000 236,300,000 235,200,000 216,400,000 197,900,000 221,100,000 210,900,000 216,500,000 215,700,000 234,000,000 248,300,000 258,100,000 259,300,000 266,900,000 250,600,000 206,800,000 188,300,000 193,000,000 174,000,000 158,500,000 156,300,000 171,300,000 175,400,000 171,800,000 173,900,000 175,100,000 178,400,000 178,600,000 180,200,000 189,500,000 190,200,000 182,100,000 145,900,000 144,700,000 149,600,000 140,300,000 118,100,000 109,500,000 103,700,000 104,200,000 104,400,000 109,600,000 107,200,000 114,400,000 127,000,000 118,900,000 107,800,000 101,700,000 95,300,000 106,100,000 92,800,000 81,700,000 75,200,000 78,100,000 80,600,000 79,700,000 81,300,000 83,300,000 87,200,000 80,900,000 78,200,000 69,900,000 71,300,000 75,600,000 81,500,000 83,800,000 90,300,000 96,000,000 95,000,000 107,000,000 103,400,000 92,000,000 100,400,000 97,400,000 87,400,000 83,700,000 79,000,000 75,200,000 70,600,000 63,900,000 62,300,000 70,100,000 60,800,000 39,500,000 34,300,000 40,100,000 40,700,000 35,700,000 37,300,000 35,600,000 
        raw materials
      95,900,000 103,000,000 108,900,000 101,600,000 99,000,000 103,100,000 98,200,000 102,600,000 87,800,000 84,400,000 97,500,000 108,400,000 107,600,000 113,800,000 114,900,000 111,600,000 101,400,000 89,300,000 81,100,000 76,500,000 64,600,000 63,700,000 68,500,000 68,200,000 74,200,000 70,700,000 76,300,000 69,800,000 70,500,000 67,800,000 72,400,000 62,100,000 65,600,000 63,900,000 66,800,000 68,000,000 58,700,000 55,700,000 51,500,000 50,600,000 46,800,000 52,800,000 55,200,000 59,000,000 59,600,000 56,700,000 51,100,000 61,700,000 55,800,000 61,700,000 59,000,000 55,200,000 58,600,000 61,600,000 63,900,000 57,600,000 57,400,000 53,200,000 52,000,000 52,800,000 45,100,000 42,300,000 43,600,000 41,000,000 40,700,000 37,600,000 35,400,000 32,500,000 33,600,000 41,300,000 34,400,000 32,200,000 22,400,000 19,600,000 17,200,000 10,600,000 11,100,000 13,600,000 14,000,000 13,700,000 10,800,000 11,000,000 12,900,000 13,300,000        
        total inventories
      321,500,000 329,300,000 345,200,000 336,800,000 315,400,000 301,000,000 319,300,000 313,500,000 304,300,000 300,100,000 331,500,000 356,700,000 365,700,000 373,100,000 381,800,000 362,200,000 308,200,000 277,600,000 274,100,000 250,500,000 223,100,000 220,000,000 239,800,000 243,600,000 246,000,000 244,600,000 251,400,000 248,200,000 249,100,000 248,000,000 261,900,000 252,300,000 247,700,000 209,800,000 211,500,000 217,600,000 199,000,000 173,800,000 161,800,000 155,100,000 152,600,000 159,900,000 166,800,000 167,500,000 176,000,000 184,900,000 171,900,000 172,800,000 160,200,000 158,900,000 167,300,000 149,500,000 141,800,000 138,300,000 143,800,000 139,800,000 139,100,000 135,900,000 137,700,000 142,400,000 127,100,000 122,300,000 116,000,000 113,900,000 118,100,000 120,600,000 120,000,000 124,400,000 129,800,000 138,300,000 152,300,000 147,500,000 127,300,000 132,600,000 133,200,000 120,500,000 120,000,000 116,200,000 114,400,000 105,700,000  92,300,000 96,500,000 91,600,000 63,900,000 57,500,000 59,300,000  54,500,000 56,500,000 59,100,000 
        prepaid expenses
      16,900,000 20,100,000 8,700,000 13,700,000 16,000,000 21,000,000 9,200,000 9,700,000 15,000,000 18,700,000 7,700,000 10,500,000 15,400,000 14,100,000 7,400,000 12,200,000 17,200,000 18,000,000 12,300,000 11,600,000 12,300,000 14,900,000 7,900,000 9,700,000 11,600,000 14,700,000 8,900,000 11,900,000 11,700,000 11,600,000 8,400,000 8,800,000 13,200,000 13,100,000 4,100,000 5,000,000 7,200,000 6,200,000 9,200,000 5,200,000 5,500,000 6,100,000 3,900,000 5,200,000 6,600,000 8,300,000 3,800,000 3,900,000 4,400,000 5,800,000 6,600,000 3,100,000 4,600,000 4,100,000 4,300,000 3,600,000 4,400,000 4,000,000 5,000,000 6,500,000 3,400,000 4,100,000 3,800,000 5,300,000 3,700,000 3,900,000 5,200,000 5,500,000 3,600,000 4,400,000 4,800,000 6,600,000 4,900,000 5,000,000 7,500,000 3,800,000 5,100,000 5,800,000 6,100,000 4,400,000 5,300,000 7,400,000 8,400,000 4,300,000 7,200,000 7,700,000 4,000,000 4,600,000 6,300,000 6,600,000 3,900,000 
        prepaid income taxes
      10,600,000 13,100,000 10,500,000 12,100,000 1,000,000 3,100,000 5,100,000 12,100,000 4,400,000 2,800,000 10,700,000 9,800,000 3,600,000 3,300,000 13,800,000 13,200,000 9,500,000 5,800,000 3,800,000 3,500,000 5,000,000 4,200,000 8,100,000 8,000,000 4,700,000 2,500,000 6,000,000 4,300,000 1,600,000 1,500,000 9,800,000 5,000,000 2,800,000 2,800,000 4,000,000 6,900,000 5,200,000 4,800,000 7,000,000 4,900,000 4,800,000 3,000,000 1,600,000 1,500,000 1,000,000 2,000,000 600,000 5,100,000 3,400,000 11,400,000 5,000,000 4,800,000       3,500,000     2,100,000 1,600,000  7,100,000 10,900,000 5,500,000 10,100,000 9,100,000 2,000,000               900,000     
        other current assets
      6,800,000 7,300,000 4,100,000 4,400,000 1,400,000 600,000 600,000 1,000,000 900,000 600,000 1,400,000 700,000 400,000 400,000 400,000 400,000 400,000 400,000 800,000 1,500,000 2,300,000 400,000 200,000   800,000 200,000  1,000,000    600,000 1,100,000 2,000,000       1,800,000                                                  
        total current assets
      999,100,000 1,004,600,000 988,800,000 969,700,000 977,100,000 956,600,000 965,600,000 876,800,000 912,900,000 885,700,000 863,700,000 854,500,000 875,000,000 872,600,000 846,400,000 799,300,000 778,600,000 728,100,000 683,000,000 643,100,000 607,600,000 566,200,000 528,800,000 532,900,000 626,700,000 630,300,000 673,300,000 650,500,000 683,600,000 663,900,000 659,300,000 609,300,000 622,700,000 561,500,000 532,700,000 519,900,000 476,100,000 441,100,000 479,200,000 463,800,000 433,000,000 458,700,000 443,400,000 426,400,000 391,400,000 414,200,000 397,600,000 405,900,000 394,600,000 407,400,000 363,200,000 314,100,000 303,400,000 296,600,000 375,100,000 349,400,000 339,500,000 320,300,000 375,300,000 349,100,000 314,000,000 321,900,000 314,000,000 287,700,000 281,200,000 282,900,000 266,800,000 262,300,000 254,200,000 256,600,000 272,000,000 260,600,000 238,700,000 256,100,000 260,900,000 242,700,000 305,300,000 296,500,000 263,600,000 243,700,000 239,800,000 244,400,000 207,600,000 224,600,000 210,100,000 211,000,000 187,300,000 178,900,000 172,800,000 171,600,000 183,400,000 
        net property, plant and equipment
      285,700,000 286,100,000 278,600,000 295,800,000 277,100,000 269,700,000 278,200,000 271,900,000 268,700,000 268,300,000 244,600,000 242,300,000 233,600,000 220,900,000 206,600,000 209,700,000 213,700,000 214,400,000 213,000,000 214,100,000 209,900,000 210,800,000 204,200,000 198,900,000 197,800,000 198,700,000 195,000,000 200,300,000 199,700,000 196,400,000 194,700,000 191,400,000 196,800,000 196,000,000 189,200,000 186,900,000 177,100,000 157,400,000 80,200,000 78,000,000 76,600,000 76,000,000 74,100,000 72,500,000 80,000,000  60,700,000 61,300,000 60,100,000  50,700,000 49,600,000 49,000,000  46,700,000 45,700,000 46,500,000  47,400,000 48,900,000 48,600,000  48,800,000 47,100,000 48,100,000  51,100,000 52,500,000 51,800,000  57,500,000 63,600,000 65,700,000  65,900,000 64,700,000  63,800,000 65,700,000 66,200,000  68,500,000 72,100,000 75,700,000 72,300,000 46,000,000 47,000,000  49,000,000 50,200,000 70,400,000 
        operating lease right-of-use assets
      50,600,000  49,000,000 49,300,000 44,400,000  45,500,000 47,900,000   42,500,000 45,900,000 49,000,000  45,900,000 49,300,000 42,300,000  33,400,000 36,400,000 36,700,000  29,700,000 29,500,000 31,700,000  33,800,000 36,000,000 37,400,000                                                               
        goodwill
      399,100,000 399,000,000 399,800,000 397,600,000 388,400,000 382,500,000 392,300,000 388,200,000 397,500,000 399,300,000 357,900,000 360,600,000 360,200,000 358,800,000 351,700,000 357,000,000 362,000,000 364,300,000 366,000,000 368,200,000 367,200,000 371,200,000 367,200,000 363,300,000 361,200,000 363,000,000 360,500,000 364,300,000 363,100,000 364,900,000 366,300,000 367,100,000 364,100,000 361,800,000 346,800,000 335,500,000 335,400,000 374,800,000 267,400,000 267,400,000 267,500,000 267,400,000 268,300,000 268,400,000 275,900,000 276,100,000 187,900,000 188,100,000 187,900,000 187,900,000 165,300,000 148,700,000 148,600,000 149,000,000 140,500,000 140,800,000 141,200,000 141,500,000 141,900,000 142,600,000                  171,100,000 181,500,000 189,100,000 200,400,000 211,300,000 219,200,000 321,500,000 369,800,000 329,500,000 345,500,000 348,900,000 351,500,000 350,800,000 349,500,000 
        other intangible assets
      68,900,000 67,700,000 63,300,000 78,300,000 72,800,000 65,400,000 63,600,000 61,400,000 57,700,000 57,300,000 47,800,000 46,700,000 46,900,000 45,000,000 43,600,000 48,100,000 53,000,000 57,500,000 61,900,000 66,400,000 70,200,000 75,300,000 78,600,000 82,300,000 107,100,000 113,500,000 118,400,000 125,100,000 130,400,000 136,300,000 142,300,000 149,400,000 158,300,000 163,300,000 169,600,000 164,100,000 171,200,000 144,400,000 150,500,000 156,600,000 162,600,000 168,700,000 172,600,000 175,900,000 178,600,000 181,100,000 120,200,000 121,100,000 124,000,000 126,800,000 104,800,000 68,100,000 68,500,000 68,600,000                                      
        deferred tax assets
      13,000,000 13,600,000 8,900,000 8,900,000 8,600,000 9,400,000 10,500,000 10,400,000 10,400,000 10,400,000 5,900,000 5,900,000 5,900,000 5,900,000 5,700,000 6,000,000 6,200,000 6,400,000 7,300,000 7,400,000 7,400,000 7,600,000 9,400,000 8,900,000 8,800,000 9,100,000 8,300,000 8,600,000 8,600,000 8,800,000 6,200,000 6,200,000 6,400,000 6,500,000 16,300,000 15,500,000 14,300,000                  20,200,000 20,200,000 20,000,000 19,700,000                                  
        other non-current assets
      3,400,000 8,700,000 11,000,000 6,500,000 5,000,000 3,900,000 3,900,000 6,700,000 6,000,000 6,200,000 6,500,000 5,800,000 4,900,000 7,100,000 6,600,000 6,700,000 7,200,000 5,000,000 5,000,000 5,000,000 7,500,000 8,200,000 5,800,000 4,600,000 4,700,000 5,900,000 4,400,000 5,400,000 6,200,000 7,200,000 6,900,000 8,200,000 6,800,000 5,100,000 3,100,000 2,400,000 1,100,000 800,000 800,000 2,300,000 700,000 900,000 900,000 1,300,000 400,000 700,000 800,000 1,500,000 1,400,000 1,800,000 1,000,000 700,000 1,400,000 1,400,000 900,000 100,000 200,000 600,000 500,000 2,500,000 2,900,000 1,900,000 2,500,000 300,000 900,000 1,100,000 1,700,000 1,000,000                        
        total assets
      1,819,800,000 1,832,400,000 1,799,400,000 1,806,100,000 1,774,600,000 1,734,700,000 1,797,700,000 1,700,300,000 1,732,800,000 1,707,400,000 1,618,600,000 1,610,800,000 1,624,100,000 1,603,700,000 1,669,200,000 1,637,900,000 1,623,800,000 1,570,900,000 1,492,400,000 1,461,800,000 1,426,100,000 1,397,400,000 1,343,700,000 1,339,000,000 1,455,300,000 1,468,800,000 1,494,400,000 1,489,600,000 1,526,600,000 1,473,400,000 1,497,100,000 1,451,200,000 1,472,900,000 1,410,200,000 1,312,600,000 1,276,900,000 1,225,400,000 1,181,400,000 1,043,300,000 1,031,100,000 1,001,000,000 1,030,000,000 1,016,800,000 998,400,000 976,800,000 999,900,000 774,600,000 786,800,000 777,600,000 794,700,000 697,900,000 593,900,000 584,300,000 579,400,000 634,400,000 603,000,000 592,000,000 568,800,000 597,500,000 572,100,000 539,200,000 548,300,000 560,700,000 533,000,000 537,200,000 543,100,000 502,500,000 500,800,000 494,200,000 494,300,000 546,200,000 549,400,000 531,400,000 551,100,000                  
        liabilities and equity
                                                                                                 
        current liabilities:
                                                                                                 
        accounts payable
      138,500,000 174,700,000 162,200,000 149,400,000 169,500,000 163,800,000 169,000,000 147,700,000 166,400,000 163,600,000 146,100,000 157,900,000 177,700,000 165,300,000 173,600,000 180,900,000 161,800,000 148,700,000 137,100,000 123,500,000 114,500,000 98,700,000 81,800,000 74,100,000 108,400,000 122,000,000 106,100,000 117,100,000 123,900,000 126,800,000 127,400,000 125,600,000 128,200,000 117,900,000 115,700,000 108,000,000 97,500,000 59,600,000 56,400,000 50,700,000 49,900,000 52,200,000 67,200,000 67,400,000 59,400,000 87,600,000 51,800,000 52,000,000 53,900,000 63,300,000 56,900,000 47,000,000 46,700,000 57,300,000 54,800,000 43,100,000 57,100,000 53,300,000 53,300,000 57,500,000 52,000,000 45,900,000 42,500,000 53,000,000 46,700,000 50,200,000 46,200,000 47,300,000 52,100,000 55,400,000  63,300,000 58,300,000 50,900,000 54,600,000 55,900,000 50,000,000 51,000,000 48,300,000 45,300,000 54,500,000 43,700,000 47,100,000 58,400,000 46,600,000 35,900,000 35,000,000 53,000,000 45,800,000 49,100,000 63,600,000 
        accrued liabilities
      169,300,000 152,300,000 167,300,000 163,500,000 147,500,000 169,100,000 170,000,000 143,100,000 163,600,000 185,900,000 165,100,000 174,700,000 163,500,000 202,900,000 173,900,000 152,500,000 156,500,000 166,500,000 147,600,000 142,300,000 131,800,000 129,800,000 125,700,000 118,800,000 127,900,000 154,000,000 159,500,000 132,000,000 123,800,000 132,100,000 122,900,000 105,700,000 130,600,000 104,100,000 94,000,000 91,400,000 90,400,000 94,300,000 79,700,000 72,700,000 65,400,000 84,100,000 69,100,000 69,600,000 71,900,000 77,200,000 65,300,000 62,900,000 61,800,000 73,500,000 82,600,000 70,700,000 69,600,000         85,700,000    104,400,000 74,100,000 60,000,000 45,200,000 46,300,000 57,800,000 60,600,000 65,100,000 65,700,000 45,300,000 47,800,000 55,500,000 49,300,000 48,200,000 46,400,000 59,400,000 58,300,000 52,500,000 58,500,000 54,900,000 51,700,000 54,100,000 43,700,000 43,000,000 41,900,000  
        current portion of operating lease liabilities
      15,100,000 15,900,000 16,000,000 15,600,000 14,000,000 13,900,000 14,000,000 14,900,000 13,600,000 13,600,000 13,100,000 14,300,000 15,200,000 13,900,000 13,600,000 14,100,000 14,100,000 12,400,000 13,300,000 12,100,000 12,200,000 11,300,000 11,300,000 11,000,000 11,100,000 10,600,000 11,000,000 11,600,000 11,400,000                                                               
        current portion of plant closure provisions
      4,900,000 4,900,000 5,000,000 5,000,000 5,000,000 5,000,000 4,600,000 4,600,000 4,600,000 4,600,000 4,700,000 4,300,000 5,000,000 5,300,000 5,600,000 6,600,000 6,200,000 5,200,000 5,700,000 6,600,000 6,600,000 6,600,000 5,200,000 6,300,000 5,600,000 5,600,000 3,900,000 5,300,000 5,300,000 5,900,000 4,000,000 4,100,000 4,200,000 5,200,000 5,900,000 6,100,000 6,400,000 6,700,000 5,000,000 5,700,000 5,400,000 6,400,000 3,800,000 5,100,000 4,900,000 5,700,000 4,100,000 4,800,000 5,400,000 6,200,000 3,700,000 3,700,000 4,200,000 5,100,000 3,600,000 3,300,000 3,300,000 4,100,000 3,500,000 4,000,000 4,200,000 3,900,000 4,400,000 4,400,000 4,300,000 3,900,000 5,400,000 4,900,000 5,300,000 4,100,000 4,600,000 5,200,000 3,300,000 4,400,000 5,400,000 5,200,000 5,600,000 6,300,000 7,000,000 7,300,000 10,100,000 11,300,000 10,300,000 10,100,000 11,700,000 9,000,000 8,700,000 9,200,000 10,400,000 11,800,000  
        current portion of acquisition-related contingent consideration
      2,700,000 7,000,000                                 1,100,000 1,100,000 1,100,000 1,100,000 4,300,000 6,500,000 8,900,000 54,600,000 43,600,000 39,000,000 47,300,000 45,700,000                                              
        accrued income taxes
      4,300,000  5,600,000 3,900,000 21,600,000                                                900,000 3,200,000 3,100,000 4,000,000 2,900,000 2,000,000  2,700,000 5,500,000 6,100,000 1,200,000   6,300,000       3,100,000 6,900,000 5,000,000 5,100,000 14,700,000 13,900,000 7,300,000 5,500,000  200,000 1,000,000 14,900,000 11,900,000 8,400,000  2,800,000 12,400,000 5,400,000 9,300,000 
        total current liabilities
      334,800,000 360,100,000 356,100,000 337,400,000 357,600,000 371,400,000 373,100,000 332,800,000 364,900,000 371,500,000 344,200,000 364,900,000 381,600,000 405,800,000 381,400,000 369,200,000 352,300,000 336,600,000 308,300,000 291,000,000 274,300,000 252,400,000 229,800,000 219,200,000 266,100,000 303,500,000 296,700,000 303,700,000 300,000,000 296,600,000 290,500,000 267,300,000 292,600,000 261,600,000 237,900,000 228,400,000 221,700,000 183,100,000 159,000,000 149,200,000 147,400,000 206,100,000 196,700,000 193,600,000 189,300,000 222,900,000 121,400,000 125,500,000 127,000,000 155,600,000 153,800,000 128,900,000 128,900,000 147,300,000 152,100,000 131,700,000 142,400,000 146,000,000 221,400,000 178,600,000 163,600,000 158,900,000 141,200,000 138,600,000 149,200,000 179,900,000 151,800,000 138,300,000 130,000,000 188,100,000 219,700,000 219,500,000 140,200,000 160,700,000 139,300,000 146,200,000 142,900,000 140,900,000 141,200,000 134,200,000 140,500,000 150,400,000 145,400,000 176,500,000 163,400,000 138,700,000 131,500,000 112,800,000 170,900,000 158,400,000 198,200,000 
        operating lease liabilities, net of current portion
      35,500,000 36,800,000 33,000,000 33,700,000 30,400,000 31,000,000 31,700,000 33,200,000 30,000,000 31,600,000 29,400,000 31,600,000 33,800,000 31,400,000 32,100,000 35,200,000 28,300,000 23,100,000 20,200,000 24,400,000 24,600,000 28,900,000 18,500,000 18,600,000 20,700,000 21,900,000 22,800,000 24,400,000 26,000,000                                                               
        plant closure provisions, net of current portion
      60,800,000 60,200,000 63,200,000 63,800,000 57,200,000 55,300,000 58,700,000 56,500,000 56,600,000 57,000,000 51,100,000 52,600,000 52,000,000 51,900,000 50,000,000 49,200,000 50,100,000 51,300,000 50,800,000 51,000,000 51,300,000 51,900,000 52,700,000 51,600,000 43,700,000 43,700,000 45,300,000 44,100,000 44,400,000 43,600,000 44,900,000 43,900,000 42,700,000 40,900,000 36,800,000 35,600,000 34,200,000 32,800,000 34,200,000 32,900,000 32,700,000 31,300,000 31,200,000 29,900,000 29,400,000 28,400,000 27,400,000 26,800,000 27,300,000 26,200,000 27,400,000 27,000,000 26,200,000 25,300,000 24,900,000 25,000,000 24,900,000 24,500,000 23,500,000 23,400,000 23,500,000 23,600,000 23,300,000 23,500,000 23,900,000 24,500,000 21,600,000 21,900,000 22,700,000 22,800,000 21,900,000 22,400,000 23,200,000 22,400,000 22,200,000 22,300,000 22,200,000 21,800,000 21,700,000 20,800,000 21,000,000 20,300,000 20,800,000 17,300,000 23,200,000       
        deferred tax liabilities
      17,900,000 19,100,000 14,100,000 24,000,000 23,000,000 23,500,000 35,800,000 35,400,000 34,100,000 33,500,000 26,400,000 27,300,000 27,400,000 26,200,000 59,700,000 60,800,000 61,300,000 60,800,000 54,400,000 54,400,000 46,500,000 46,900,000 47,200,000 44,000,000 49,900,000 49,600,000 47,200,000 48,100,000 48,100,000 48,200,000 46,700,000 46,000,000 46,700,000 45,000,000 48,600,000 47,300,000 43,300,000 32,300,000                 4,300,000 4,200,000 3,400,000 2,900,000                                  
        pension liabilities and post-employment benefits
      12,800,000 13,200,000 13,800,000 13,900,000 12,900,000 13,100,000 13,300,000 12,700,000 13,000,000 13,300,000 12,200,000 12,400,000 12,700,000 12,200,000 15,600,000 16,400,000 17,400,000 17,800,000 19,100,000 19,500,000 19,500,000 20,500,000 18,700,000 17,900,000 17,400,000 17,800,000 15,400,000 16,000,000 15,600,000 15,700,000 16,600,000 16,400,000 17,000,000 16,500,000                                                          
        acquisition-related contingent consideration
      1,300,000 1,300,000 8,200,000 24,500,000 22,600,000 20,100,000 21,500,000 20,200,000 23,500,000                                    51,400,000 49,500,000 4,900,000 4,800,000 4,700,000 4,600,000 4,600,000 4,500,000 4,400,000 4,300,000                                      
        other non-current liabilities
      4,500,000 8,800,000 8,100,000 7,300,000 5,200,000 4,200,000 5,000,000 2,900,000 2,400,000 2,300,000 1,500,000 1,600,000 1,500,000 1,400,000 1,400,000 1,400,000 1,400,000 1,400,000 2,300,000 2,400,000 2,400,000 3,400,000 2,700,000 1,400,000 1,500,000 1,700,000 1,900,000 1,900,000 2,000,000 2,100,000 5,300,000 5,000,000 1,900,000 1,400,000 400,000 500,000 900,000 1,000,000 900,000 300,000 900,000 500,000 100,000 700,000 1,600,000 2,000,000 1,500,000 200,000 100,000 300,000 200,000 200,000 2,200,000 200,000 100,000 300,000 100,000 800,000 200,000 400,000 400,000 500,000 600,000 3,500,000 2,100,000 700,000 3,600,000 2,200,000 9,300,000 13,900,000 100,000 200,000 300,000                   
        total liabilities
      467,600,000 499,500,000 496,500,000 504,600,000 508,900,000 518,600,000 550,100,000 504,400,000 546,600,000 557,800,000 490,500,000 516,000,000 543,500,000 563,300,000 577,300,000 569,300,000 554,900,000          612,200,000 626,500,000 677,700,000  656,800,000 631,500,000 648,100,000  564,700,000 572,500,000 548,900,000  391,100,000 391,600,000 381,900,000  428,600,000 448,700,000 454,700,000  317,100,000 345,500,000                                            
        equity:
                                                                                                 
        common stock, 0.01 par value...
      300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000  300,000 300,000 300,000  100,000 100,000     100,000           
        additional paid-in capital
      377,300,000 376,500,000 373,600,000 372,700,000 370,700,000 369,900,000 366,600,000 364,500,000 362,400,000 361,000,000 358,900,000 356,700,000 354,800,000 354,100,000 352,200,000 350,900,000 349,600,000 346,700,000 341,300,000 339,500,000 337,800,000 336,100,000 334,400,000 333,000,000 331,200,000 330,400,000 329,400,000 327,700,000 326,000,000 324,900,000 322,900,000 321,600,000 321,100,000 320,400,000 317,900,000 316,900,000 315,700,000 315,100,000 313,400,000 312,400,000 311,400,000 311,000,000 310,600,000 309,900,000 308,900,000 308,800,000 310,500,000 310,100,000 309,300,000 308,800,000 297,000,000 292,400,000 292,100,000 292,100,000 290,600,000 291,300,000 292,200,000 291,500,000 289,400,000 285,900,000 286,000,000 286,300,000 286,100,000 285,700,000 285,900,000 285,800,000 284,700,000 283,900,000 283,200,000 282,500,000 280,500,000 280,700,000 280,900,000 280,600,000 280,400,000 282,500,000 281,700,000 281,400,000 280,400,000 279,800,000 276,200,000 276,200,000 276,200,000 276,200,000 276,500,000 276,500,000 276,400,000 276,800,000 276,800,000 276,700,000 276,700,000 
        treasury stock
      -121,400,000 -115,200,000 -115,300,000 -104,700,000 -96,500,000 -93,000,000 -93,400,000 -93,400,000 -93,300,000 -94,300,000 -94,200,000 -94,200,000 -93,500,000 -95,400,000 -94,600,000 -92,300,000 -90,600,000 -90,600,000 -93,000,000 -93,100,000 -93,600,000 -93,300,000 -93,700,000 -93,800,000 -94,000,000 -93,300,000 -93,300,000 -93,400,000 -93,500,000 -92,800,000 -92,900,000 -93,000,000 -93,200,000 -93,300,000 -97,100,000 -97,100,000 -97,100,000 -97,500,000 -99,000,000 -99,100,000 -99,200,000 -91,800,000 -92,100,000 -88,300,000 -83,300,000 -78,700,000 -72,800,000 -72,900,000 -72,900,000 -73,300,000 -81,600,000 -84,100,000 -83,600,000 -85,000,000 -85,700,000 -86,500,000 -88,000,000 -88,100,000 -79,600,000 -66,500,000 -66,500,000 -64,800,000 -62,300,000 -62,600,000 -63,100,000 -64,200,000 -64,200,000 -64,300,000 -64,700,000 -64,900,000 -64,900,000 -65,100,000 -64,500,000 -58,200,000 -49,400,000 -46,900,000 -44,700,000 -45,200,000 -40,500,000 -34,300,000 -32,000,000 -31,500,000 -31,200,000 -29,900,000 -29,300,000 -28,900,000 -28,600,000 -32,400,000 -33,600,000 -33,400,000 -34,300,000 
        retained earnings
      1,129,600,000 1,099,200,000 1,073,400,000 1,060,500,000 1,057,800,000 1,025,000,000 1,115,200,000 1,081,800,000 1,069,600,000 1,028,200,000 1,008,300,000 969,100,000 957,400,000 924,200,000 914,800,000 876,100,000 859,400,000 822,900,000 813,800,000 790,400,000 782,000,000 758,600,000 748,800,000 736,100,000 788,600,000 755,500,000 737,200,000 707,100,000 697,000,000 668,300,000 658,900,000 638,300,000 627,200,000 605,000,000 619,200,000 595,900,000 579,000,000 561,800,000 547,500,000 536,100,000 515,300,000 496,400,000 472,500,000 436,900,000 409,700,000 391,800,000 377,100,000 356,300,000 344,400,000 327,500,000 330,100,000 316,100,000 299,000,000 281,000,000 315,000,000 299,500,000 284,000,000 259,400,000 239,800,000 256,600,000 232,000,000 210,500,000 186,200,000 154,500,000 144,200,000 136,800,000 137,100,000 139,800,000 136,800,000 131,600,000 126,600,000 128,400,000 127,600,000 121,500,000 105,500,000 99,700,000 97,900,000 98,600,000 89,000,000 89,000,000 88,400,000 95,800,000 105,700,000 211,400,000 227,900,000 218,800,000 215,600,000 209,100,000 196,200,000 177,800,000 160,200,000 
        accumulated other comprehensive loss
      -40,800,000 -34,700,000 -35,000,000 -33,400,000 -72,300,000 -91,000,000 -145,300,000 -160,600,000 -155,400,000 -148,100,000 -147,900,000 -139,700,000 -140,800,000 -145,200,000 -83,300,000 -67,100,000 -50,500,000 -46,900,000 -69,900,000 -63,500,000 -67,900,000 -57,300,000 -64,300,000 -76,400,000 -82,300,000 -74,400,000 -91,800,000 -79,000,000 -81,400,000 -75,700,000 -49,300,000 -47,900,000 -31,000,000 -38,500,000 -92,800,000 -112,000,000 -121,700,000 -126,200,000 -110,300,000 -110,500,000 -109,000,000 -110,900,000 -103,500,000 -109,500,000 -113,500,000 -106,300,000 -157,600,000 -152,500,000 -154,300,000 -153,900,000 -169,800,000 -173,200,000 -174,000,000 -171,400,000 -117,200,000 -118,900,000 -119,900,000 -120,000,000 -138,400,000 -135,500,000 -131,000,000 -131,600,000 -192,600,000 -192,200,000 -204,200,000 -201,100,000 -118,400,000 -111,800,000 -120,600,000 -120,200,000    -72,700,000   -110,000,000               
        total innospec stockholders’ equity
      1,345,000,000 1,326,100,000 1,297,000,000 1,295,400,000 1,260,000,000 1,211,200,000 1,243,400,000 1,192,600,000 1,183,600,000 1,147,100,000 1,125,400,000 1,092,200,000 1,078,200,000 1,038,000,000 1,089,400,000 1,067,900,000 1,068,200,000 1,032,400,000 992,500,000 973,600,000 958,600,000 944,400,000 925,500,000 899,200,000 943,800,000 918,500,000 881,800,000 862,700,000 848,400,000 825,000,000 839,900,000 819,300,000 824,400,000 793,900,000 747,500,000 704,000,000 676,200,000 653,500,000 651,900,000 639,200,000 618,800,000 605,000,000 587,800,000 549,300,000                                                
        non-controlling interest
      7,200,000 6,800,000 5,900,000 6,100,000 5,700,000 4,900,000 4,200,000 3,300,000 2,600,000 2,500,000 2,700,000 2,600,000 2,400,000 2,400,000 2,500,000 700,000 700,000 600,000 600,000 600,000 500,000 500,000 500,000 500,000 500,000 400,000 400,000 400,000 500,000 500,000 400,000 400,000 400,000 400,000 400,000 400,000 300,000 300,000 300,000 300,000 300,000 300,000 400,000 400,000                                                
        total equity
      1,352,200,000 1,332,900,000 1,302,900,000 1,301,500,000 1,265,700,000 1,216,100,000 1,247,600,000 1,195,900,000 1,186,200,000 1,149,600,000 1,128,100,000 1,094,800,000 1,080,600,000 1,040,400,000 1,091,900,000 1,068,600,000 1,068,900,000 1,033,000,000 993,100,000 974,200,000 959,100,000 944,900,000 926,000,000 899,700,000 944,300,000 918,900,000 882,200,000 863,100,000 848,900,000 825,500,000 840,300,000 819,700,000 824,800,000 794,300,000 747,900,000 704,400,000 676,500,000 653,800,000 652,200,000 639,500,000 619,100,000 605,300,000 588,200,000 549,700,000                                                
        total liabilities and equity
      1,819,800,000 1,832,400,000 1,799,400,000 1,806,100,000 1,774,600,000 1,734,700,000 1,797,700,000 1,700,300,000 1,732,800,000 1,707,400,000 1,618,600,000 1,610,800,000 1,624,100,000 1,603,700,000 1,669,200,000 1,637,900,000 1,623,800,000 1,570,900,000 1,492,400,000 1,461,800,000 1,426,100,000 1,397,400,000 1,343,700,000 1,339,000,000 1,455,300,000 1,468,800,000 1,494,400,000 1,489,600,000 1,526,600,000 1,473,400,000 1,497,100,000 1,451,200,000 1,472,900,000 1,410,200,000 1,312,600,000 1,276,900,000 1,225,400,000 1,181,400,000 1,043,300,000 1,031,100,000 1,001,000,000 1,030,000,000 1,016,800,000 998,400,000                                                
        operating leases right-of-use assets
       52,700,000    44,800,000   43,500,000 45,100,000    45,300,000    35,400,000    40,100,000    32,400,000                                                                  
        pension asset
          1,200,000 2,400,000 38,100,000 37,000,000 36,100,000 35,100,000 49,700,000 49,100,000 48,600,000 48,100,000 162,700,000 161,800,000 160,800,000 159,800,000 122,800,000 121,200,000 119,600,000 118,000,000 120,000,000 118,600,000 117,300,000 115,900,000 100,700,000 99,400,000 97,600,000 95,900,000 121,400,000 119,600,000 117,800,000 116,000,000 54,900,000 52,600,000 50,200,000 48,000,000 62,600,000 60,400,000 57,900,000 55,500,000 56,300,000 52,500,000 48,900,000 45,200,000         28,600,000 26,200,000 23,800,000 21,400,000             38,200,000 37,400,000 36,100,000 34,800,000                  
        current portion of accrued income taxes
       5,300,000    19,600,000 15,500,000 21,300,000 12,200,000 2,600,000 15,200,000 13,700,000 20,200,000 18,400,000 14,700,000 15,100,000 13,700,000 3,700,000 4,600,000 6,300,000 8,800,000 5,500,000 5,400,000 8,400,000 12,300,000 10,300,000 15,000,000 14,200,000 12,600,000 8,600,000 17,900,000 13,800,000 11,300,000 15,800,000 8,200,000 9,000,000 13,900,000 9,400,000 11,800,000 12,300,000 9,900,000 7,900,000 4,500,000 3,900,000 4,800,000 5,600,000                                              
        current portion of unrecognized tax benefits
             1,200,000 4,500,000 1,200,000                                        6,800,000 5,400,000 2,400,000 2,400,000 3,000,000 3,000,000 3,200,000 3,200,000 3,200,000 800,000 2,200,000 2,200,000 2,200,000 3,500,000 4,900,000 9,900,000 5,000,000 16,000,000 16,000,000 16,100,000 9,200,000 8,700,000 8,500,000 8,300,000 12,600,000 8,900,000 9,200,000                
        accrued income taxes, net of current portion
              11,600,000 11,600,000 11,600,000 11,600,000 20,800,000 21,000,000 20,800,000 20,800,000 27,800,000 30,600,000 27,800,000 28,600,000 32,400,000 32,400,000 32,400,000 32,400,000 36,200,000 36,200,000 36,200,000 36,300,000 40,000,000 40,000,000 39,700,000 39,700,000 43,600,000 41,700,000                                                          
        unrecognized tax benefits, net of current portion
              10,500,000 13,600,000    13,400,000    16,300,000    16,000,000    16,400,000 14,900,000 14,600,000 14,200,000 14,000,000 3,200,000 3,100,000 3,100,000 2,500,000 1,800,000    2,300,000 3,500,000 3,900,000 3,900,000 3,600,000 6,300,000 6,300,000 6,200,000 5,900,000 9,000,000 9,000,000 6,200,000 7,100,000 10,000,000 10,000,000 9,800,000 9,500,000 9,500,000 9,500,000 9,400,000 11,000,000 6,500,000 6,500,000 6,400,000 8,100,000 11,600,000 11,600,000 14,400,000 20,100,000 19,900,000 19,500,000 25,600,000 31,200,000 29,000,000 29,100,000 27,400,000 26,700,000 26,500,000                
        unrecognized tax benefits
            11,000,000 10,700,000   14,100,000 14,000,000 13,700,000  16,300,000 16,300,000 16,300,000  16,400,000 16,300,000 16,000,000  15,500,000 15,200,000 16,400,000           2,300,000 2,300,000 2,300,000                                                      
        acquisition-related contingent deferred consideration
               23,400,000                                                                                  
        current portion of finance leases
                       100,000  200,000 400,000 500,000 400,000 600,000 800,000 1,000,000 1,200,000 1,300,000 1,500,000 1,800,000 2,000,000 2,300,000 2,500,000 2,700,000 2,600,000 2,400,000 2,000,000 1,600,000 1,600,000 1,100,000 900,000 700,000 700,000 600,000 600,000 500,000                                              
        finance leases
                                                                                                 
        finance leases, net of current portion
                           100,000 200,000 200,000 400,000 500,000 600,000 900,000 1,100,000 1,500,000 1,800,000 2,100,000 2,700,000 3,200,000 3,200,000 3,400,000 2,700,000 2,900,000 2,900,000 2,800,000 2,300,000 2,400,000 2,400,000 2,400,000 2,300,000 1,700,000                                              
        long-term debt
                             38,800,000 58,700,000 58,600,000 131,200,000 136,500,000 186,300,000 186,200,000 208,100,000 208,000,000 197,800,000 202,600,000 219,000,000 238,800,000 228,700,000 258,500,000 143,000,000 154,000,000 146,000,000 133,000,000 127,000,000 139,000,000 139,000,000 139,000,000 115,000,000 134,200,000 134,300,000 142,700,000 88,000,000 28,000,000 32,000,000 25,000,000 29,000,000 35,000,000 31,000,000 30,000,000 10,000,000   32,000,000 33,000,000 32,000,000 30,000,000 41,000,000 51,000,000 56,000,000 63,000,000    59,000,000 61,000,000 100,000,000 55,000,000 133,000,000 132,800,000 119,000,000 117,000,000 130,100,000 130,100,000 112,400,000 112,600,000 113,500,000  75,400,000 102,900,000 75,200,000 108,700,000 112,700,000 
        current portion of long-term debt
                                 21,500,000 21,500,000 21,400,000 15,800,000 15,800,000 15,800,000 15,800,000 10,300,000   10,300,000       200,000 400,000  5,300,000 5,400,000 5,300,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 5,000,000 80,000,000 33,000,000                  17,500,000 28,400,000 27,700,000 14,500,000 34,900,000 32,500,000 32,600,000 36,300,000 31,700,000 31,700,000 1,700,000 56,800,000 41,800,000 56,800,000 
        overdraft
                                 700,000                                                                
        bank overdraft
                                    500,000          6,800,000  7,600,000                                              500,000 6,400,000  
        property, plant and equipment:
                                                                                                 
        gross cost
                                      321,400,000  312,900,000 300,700,000 278,100,000  174,500,000 168,600,000 165,700,000  158,400,000 153,900,000 185,700,000  159,800,000 161,800,000 157,500,000  155,100,000 147,100,000 144,300,000  140,400,000 136,500,000 137,000,000                                   
        less accumulated depreciation
                                      -124,600,000  -123,700,000 -113,800,000 -101,000,000  -94,300,000 -90,600,000 -89,100,000  -84,300,000 -81,400,000 -105,700,000  -99,100,000 -100,500,000 -97,400,000  -104,400,000 -97,500,000 -95,300,000  -93,700,000 -90,800,000 -90,500,000  -86,300,000 -86,200,000 -83,500,000  -78,300,000 -72,800,000 -74,100,000  -71,900,000 -68,100,000 -61,800,000  -60,800,000 -61,100,000 -57,800,000  -47,000,000 -42,400,000  -35,800,000 -32,100,000 -28,500,000  -24,500,000 -20,900,000 -19,200,000 -20,700,000 -17,200,000 -52,100,000  -45,200,000 -42,500,000 32,600,000 
        current portion of deferred income
                                       100,000 100,000 100,000 100,000 100,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 200,000 300,000 300,000 300,000 100,000 100,000 100,000 1,400,000 300,000 300,000 2,200,000 1,400,000 1,400,000 100,000 100,000 100,000 100,000 100,000 400,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 1,900,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,000,000 2,400,000 2,000,000 2,000,000 2,000,000 
        deferred income, net of current portion
                                       500,000 500,000 500,000 500,000 500,000 600,000 600,000 600,000 600,000 700,000 700,000 800,000 900,000 1,000,000 1,100,000 1,200,000 1,200,000 900,000 900,000 900,000 900,000 900,000 900,000 900,000 900,000 1,000,000 1,100,000 900,000 900,000 1,000,000 800,000 500,000 800,000 900,000 800,000 800,000 800,000 800,000 800,000 900,000 800,000 500,000 500,000 900,000 1,300,000 1,900,000 2,400,000 2,900,000 3,400,000 3,700,000 4,200,000 4,900,000       
        pension liabilities
                                        16,500,000 15,700,000  14,200,000    9,200,000    10,400,000 29,200,000 33,000,000 36,100,000 39,000,000 36,700,000 39,500,000 42,400,000 46,000,000                                      
        current portion of long term debt
                                         10,300,000 10,300,000                                                       
        pension liability
                                          14,600,000  10,000,000 9,700,000 10,000,000  9,900,000 9,800,000 9,300,000          6,500,000 6,300,000 6,600,000 6,300,000 5,800,000 7,800,000 9,800,000 11,700,000 113,100,000 115,200,000 134,600,000 124,200,000 14,000,000 13,800,000 13,900,000 13,800,000     21,600,000 22,700,000 22,500,000               
        short-term investments
                                              1,600,000 4,800,000 5,100,000 5,500,000 5,200,000 4,700,000 4,900,000 6,000,000 5,800,000 6,600,000 6,400,000 4,300,000 5,000,000 5,100,000 4,000,000 4,700,000 4,800,000 4,800,000 4,800,000 4,400,000 4,300,000 4,200,000                              
        current portion of deferred tax assets
                                            8,600,000 8,500,000 8,700,000 8,800,000 8,100,000 8,200,000 8,400,000 8,400,000 8,700,000 8,700,000 8,700,000 8,700,000 11,000,000 11,000,000 11,300,000 11,000,000                                      
        deferred tax assets, net of current portion
                                           14,900,000 1,400,000 1,400,000 1,400,000 1,400,000 700,000 700,000 700,000 700,000 6,100,000 7,500,000 8,000,000 8,600,000 11,200,000 11,600,000 12,200,000 12,700,000                                      
        work in progress
                                            800,000 800,000 1,600,000 2,700,000 2,000,000 1,300,000 2,000,000 1,200,000 1,900,000 3,300,000 2,700,000 1,900,000 2,200,000 1,500,000 1,500,000 1,500,000 1,800,000 1,600,000 2,000,000 1,400,000 2,400,000 2,400,000 1,100,000 1,800,000 2,500,000 1,600,000 1,800,000 1,500,000 800,000 1,600,000 200,000 2,000,000 10,900,000 11,900,000 12,900,000 12,600,000 18,600,000 22,500,000 25,200,000 23,600,000 25,200,000 21,400,000 21,800,000 19,000,000 13,500,000 17,500,000        
        deferred finance costs
                                            1,200,000 1,200,000 1,300,000 1,400,000 500,000 700,000 900,000 1,100,000 1,300,000 1,400,000 1,600,000 1,800,000 1,700,000 1,100,000 1,200,000 1,300,000 1,400,000 1,500,000 1,600,000 1,700,000  100,000 300,000 500,000 800,000 1,100,000 1,600,000 1,900,000 2,300,000 2,800,000 3,400,000 500,000 400,000  100,000 300,000 1,000,000 1,300,000 1,600,000 1,800,000 2,000,000 2,000,000 2,100,000 600,000 800,000 1,200,000 1,800,000 1,900,000 2,300,000 100,000 2,200,000 3,300,000 4,900,000 
        deferred tax liabilities, net of current portion
                                            38,200,000 38,600,000 38,100,000 37,700,000 37,000,000 33,100,000 25,300,000 23,000,000 10,800,000 10,900,000 11,100,000 9,500,000 3,200,000 3,400,000 3,500,000 3,600,000                                      
        acquisition-related contingent consideration, net of current portion
                                                20,000,000 33,200,000                                                
        assets held for sale
                                                 42,700,000                                                
        liabilities held for sale
                                                 7,800,000                                                
        liabilities and stockholders’ equity
                                                                                                 
        stockholders’ equity:
                                                                                                 
        total stockholders’ equity
                                                  522,100,000 515,900,000 457,500,000 441,300,000 426,800,000 409,400,000 376,000,000 351,500,000 333,800,000 317,000,000 403,000,000 385,700,000 368,600,000 343,100,000 311,500,000 340,800,000 320,800,000 300,700,000 217,700,000 185,700,000 163,100,000 157,600,000 239,500,000 247,900,000 235,000,000 229,300,000 268,100,000 272,700,000 272,200,000 271,500,000 229,200,000 226,300,000 225,000,000 320,400,000 314,900,000 317,300,000 314,400,000 323,900,000 333,700,000 443,100,000 453,800,000 442,300,000 440,800,000 430,200,000 415,700,000 392,600,000 359,600,000 
        total liabilities and stockholders’ equity
                                                  976,800,000 999,900,000 774,600,000 786,800,000 777,600,000 794,700,000 697,900,000 593,900,000 584,300,000 579,400,000 634,400,000 603,000,000 592,000,000 568,800,000 597,500,000 572,100,000 539,200,000 548,300,000 560,700,000 533,000,000 537,200,000 543,100,000 502,500,000 500,800,000 494,200,000 494,300,000 546,200,000 549,400,000 531,400,000 551,100,000                  
        property, plant and equipment
                                                   80,800,000    60,400,000    49,800,000    45,900,000 133,700,000 135,100,000 132,100,000 48,700,000 127,100,000 119,900,000 122,200,000 50,600,000 123,000,000 120,600,000 113,600,000 53,500,000 118,300,000 124,700,000 123,500,000 66,200,000 112,900,000 107,100,000 66,500,000 99,600,000 97,800,000 94,700,000 67,300,000 93,000,000 93,000,000 94,900,000 93,000,000 63,200,000 99,100,000 48,700,000 94,200,000 92,700,000 103,000,000 
        current portion of deferred tax liabilities
                                                     200,000 200,000 200,000 100,000   200,000                                      
        current portion of accrued liabilities
                                                           72,100,000 82,300,000 72,800,000 68,700,000 77,000,000 82,400,000 79,100,000 72,600,000  74,500,000 61,200,000 72,900,000                           
        accrued liabilities, net of current portion
                                                            4,100,000 4,400,000 4,600,000 4,900,000 13,100,000 13,500,000 13,700,000 13,600,000 22,700,000 22,100,000 22,200,000                           
        commitments and contingencies
                                                                                                 
        stockholders’ equity
                                                                                                 
        intangible assets
                                                            21,000,000 19,100,000 19,200,000 17,700,000 15,600,000 16,800,000 17,800,000 19,000,000 20,200,000 21,400,000 22,500,000 23,700,000 24,800,000 26,000,000 27,100,000 28,300,000 29,400,000 37,900,000 39,800,000 41,900,000 51,000,000 27,100,000 30,200,000 33,600,000 36,700,000 39,900,000 43,000,000 46,300,000 49,500,000 52,600,000 33,200,000 35,800,000 38,300,000 40,800,000    
        inventories:
                                                                                                 
        deferred income taxes
                                                                16,800,000 12,100,000 12,500,000 12,700,000 30,200,000 30,900,000 37,600,000 36,900,000 9,200,000 9,100,000 10,100,000 7,200,000     6,100,000 5,600,000 1,600,000 42,100,000 42,100,000 42,200,000 41,900,000 45,000,000 45,200,000 46,900,000 39,500,000 39,000,000 38,900,000 38,600,000 41,200,000 41,100,000 41,600,000 
        accounts receivable
                                                                  89,300,000 84,200,000 92,700,000 89,400,000 90,300,000 89,800,000 84,300,000 77,000,000 79,800,000 89,900,000 90,600,000 88,100,000 92,400,000 94,200,000 85,400,000 83,700,000 78,300,000    64,800,000       71,700,000    
        goodwill—fuel specialties and active chemicals
                                                                  139,100,000                               
        goodwill—octane additives
                                                                  4,000,000  5,100,000 5,700,000 6,200,000  7,300,000 7,900,000 8,400,000  9,500,000 10,600,000 11,600,000  17,100,000 20,400,000                
        short-term borrowing
                                                                  27,000,000 15,000,000 15,000,000 15,000,000 15,000,000 10,000,000 10,000,000 10,000,000 10,000,000 73,000,000 92,000,000 81,000,000  20,000,000                  
        current assets
                                                                                                 
        goodwill – octane additives
                                                                   4,600,000    6,800,000    9,000,000    12,700,000   24,800,000               
        goodwill – other
                                                                   139,000,000    139,200,000    139,200,000    139,100,000   139,000,000               
        current liabilities
                                                                                                 
        short term investments
                                                                    2,700,000 3,300,000 3,300,000                           
        goodwill—other
                                                                    139,100,000 138,800,000 139,100,000  139,300,000 139,200,000 139,200,000  139,200,000 139,300,000 139,400,000  139,100,000 139,100,000                
        dividend payable
                                                                          1,200,000    1,200,000   1,100,000  900,000              
        current portion of deferred income taxes
                                                                            700,000 800,000 800,000                   
        deferred income taxes, net of current portion
                                                                            4,300,000 4,700,000 6,400,000                   
        40,000,000 shares, issued 29,554,500 shares
                                                                           300,000    300,000                  
        accounts payable dividend payable
                                                                            54,600,000                     
        minority interest
                                                                            100,000 100,000 100,000  100,000 100,000 100,000 100,000 200,000 200,000 300,000 200,000 200,000 200,000 200,000 6,700,000 7,100,000 6,600,000 5,700,000 5,400,000 5,200,000 
        accumulated other comprehensive income
                                                                            -74,400,000 -71,600,000 -72,100,000  -107,400,000 -109,100,000  -14,500,000 -14,100,000 -17,300,000 -18,300,000 -16,700,000 -17,100,000 -14,700,000 -21,400,000 -24,200,000 -22,700,000 -23,400,000 -23,800,000 -28,600,000 -43,100,000 
        current portion of deferred tax
                                                                               100,000                  
        other liabilities
                                                                                1,500,000 1,300,000 22,400,000 22,700,000 23,000,000 23,100,000 24,200,000 16,200,000 16,800,000 12,100,000 17,500,000 17,500,000 18,300,000 15,800,000 2,100,000 3,100,000  
        short-term borrowings
                                                                                20,000,000 20,000,000 15,100,000               
        restricted cash
                                                                                   2,300,000 2,300,000 2,200,000 4,300,000 4,400,000 2,300,000 4,700,000 4,500,000       
        prepaid pension cost
                                                                                   115,300,000 114,500,000 113,800,000 113,000,000 115,500,000 118,600,000 123,600,000 121,200,000 119,400,000 117,700,000 115,900,000 115,600,000 112,500,000 96,700,000 
        other assets
                                                                                     2,500,000 9,700,000 2,900,000 8,200,000 9,000,000 7,600,000 7,000,000 6,500,000 8,300,000 7,800,000 7,300,000 4,300,000 
        40,000,000 shares, issued 14,777,250 shares
                                                                                  100,000           100,000    
        accounts receivables
                                                                                   80,300,000 75,000,000 71,700,000  75,700,000 72,400,000 83,100,000 99,700,000 67,500,000 55,200,000  67,900,000 79,800,000 79,800,000 
        common stock
                                                                                   100,000 100,000 100,000  100,000 100,000 100,000 100,000 100,000 100,000  100,000 100,000 100,000 
        contingencies and commitments
                                                                                                 
        raw materials and work-in-progress
                                                                                          24,400,000 23,200,000 19,200,000  18,800,000 19,200,000 23,500,000 
        plant closure provisions
                                                                                           26,000,000 26,700,000 27,000,000 26,500,000 25,800,000 33,000,000 
        deferred income
                                                                                           5,400,000 5,900,000 7,700,000 6,900,000 7,400,000 8,900,000 
        long-term debt (note 8)*
                                                                                           75,000,000      
        other receivable—veritel
                                                                                                9,600,000 
        raw materials and work in progress
                                                                                             15,800,000    
        other payable—veritel
                                                                                                30,000,000 
        intangible asset
                                                                                              45,300,000 46,800,000 50,000,000 
        other payable – veritel
                                                                                                 
        accrued expenses
                                                                                                36,500,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-09-30 2004-06-30 2004-03-31 2003-09-30 
                                                                                                 
          cash flows from operating activities
                                                                                                 
          net income attributable to innospec
        30,400,000                                                                                         
          adjustments to reconcile net income attributable to innospec to net cash from operating activities:
                                                                                                 
          depreciation and amortization
        9,900,000 9,400,000 12,200,000 11,100,000 10,900,000 10,900,000 11,100,000 11,100,000 10,400,000 10,200,000 9,900,000 9,900,000 9,300,000 9,200,000 10,100,000 10,300,000 10,500,000 11,800,000 10,300,000 10,300,000 10,300,000 10,700,000 11,100,000 12,200,000 12,000,000 11,300,000 12,500,000 12,200,000 11,600,000 11,700,000 12,600,000 12,700,000 12,600,000 13,200,000 12,700,000 12,200,000 12,300,000 9,600,000 9,600,000 9,700,000 9,200,000 9,500,000 8,400,000 8,800,000 8,500,000 8,000,000 6,500,000 7,200,000 7,400,000 7,000,000 4,600,000 4,300,000 4,500,000 3,200,000 2,800,000 2,800,000 2,700,000 3,300,000 3,600,000 3,600,000 3,900,000 3,800,000 3,900,000 3,800,000 3,900,000 4,700,000 4,400,000 4,500,000 4,800,000 4,900,000 6,500,000 5,900,000 5,700,000 8,300,000 8,300,000 7,800,000 6,900,000 7,400,000 6,900,000 6,700,000 6,400,000 8,200,000 6,800,000 6,800,000 6,900,000 6,000,000 6,000,000 4,900,000 6,100,000 
          adjustment to fair value of contingent consideration
        -4,700,000 -1,000,000 -16,400,000 800,000 700,000 1,300,000 700,000 600,000 800,000                             -3,100,000 -2,300,000 -2,400,000 -1,600,000 -9,100,000 -8,500,000 -26,600,000 3,500,000                                             
          deferred taxes
        -700,000 400,000 -10,000,000 -300,000 -300,000 -39,900,000 -100,000 -100,000 800,000 3,100,000 -600,000 -100,000 1,200,000 -6,100,000 -400,000 100,000 900,000 -1,600,000             700,000 1,700,000 -10,400,000 200,000 2,500,000 1,000,000 400,000 -600,000 800,000 300,000 -1,900,000 3,400,000 9,400,000 1,100,000 3,900,000 1,100,000 400,000 400,000 4,900,000 200,000 900,000 -200,000 11,700,000 100,000 600,000 200,000                                 
          profit on disposal of property, plant and equipment
         -100,000 -100,000 -100,000                                                                                 
          movements on defined benefit pension plans
        -200,000                                                                                         
          stock option compensation
        1,600,000 3,100,000 900,000 2,200,000 1,900,000 2,100,000 2,200,000 2,100,000 2,100,000 2,100,000 2,000,000 2,000,000 1,900,000 2,000,000 1,500,000 1,500,000 1,700,000 -200,000 1,700,000 1,300,000 1,600,000 1,400,000 1,600,000 1,600,000 1,200,000 1,700,000 1,700,000 1,600,000 1,600,000 1,900,000 1,100,000 1,100,000 800,000 700,000 1,200,000 1,200,000 1,000,000 500,000 900,000 1,000,000 900,000 1,000,000 900,000 900,000 900,000 900,000 500,000 600,000 600,000 600,000 500,000 700,000 700,000 700,000 800,000 800,000 800,000 800,000 700,000 700,000 900,000 300,000                            
          changes in assets and liabilities, net of effects of acquired and divested companies:
                                                                                                 
          trade and other accounts receivable
        -13,700,000 6,900,000 -14,200,000 22,300,000 6,600,000 -29,200,000 -21,000,000 15,000,000 39,500,000 -42,100,000 3,100,000 32,400,000 -6,000,000 14,600,000 -8,000,000 -9,200,000 -52,900,000 16,200,000 -22,200,000 -33,600,000 -30,700,000 -11,600,000 9,800,000 84,100,000 -7,900,000 2,600,000 -20,100,000 17,800,000 -18,500,000 6,900,000 -11,200,000 -2,200,000 -33,600,000 -200,000 -900,000 -17,900,000 -64,200,000 -18,300,000 11,400,000 10,000,000 -9,100,000 -7,600,000 -500,000 7,600,000 14,100,000 -18,300,000 -1,200,000 4,400,000 14,200,000 -8,600,000 -20,200,000 10,600,000 16,800,000 -20,400,000 2,500,000 3,900,000 -100,000 -7,500,000 3,800,000                               
          inventories
        5,900,000 15,600,000 -8,900,000 -6,700,000 -6,600,000 5,800,000 200,000 -11,800,000 -6,000,000 41,000,000 23,000,000 9,900,000 9,100,000 14,100,000 -24,300,000 -58,800,000 -29,500,000 -4,900,000 -25,800,000 -25,800,000 -5,500,000 22,200,000 5,400,000 2,900,000 -5,000,000 8,400,000 -5,900,000 1,700,000 -1,800,000 13,300,000 -10,300,000 -8,100,000 -37,100,000 700,000 7,800,000 -16,500,000 -22,800,000 8,700,000 -6,700,000 -2,200,000 7,900,000 4,700,000 -700,000 -4,900,000 6,400,000 3,700,000 -1,500,000 -12,200,000 -1,100,000 14,400,000 -12,000,000 -7,900,000 -4,600,000 6,600,000 -3,400,000 -1,600,000 -2,600,000 1,400,000 3,500,000 -15,000,000 -4,200,000 -6,500,000 -1,000,000 3,600,000 1,600,000 -600,000 4,300,000 7,000,000 8,200,000 12,900,000 -7,200,000 -20,200,000 5,900,000 5,200,000 -4,600,000 -11,400,000 -1,200,000 -3,000,000 -2,000,000 -7,400,000 -8,600,000 -6,900,000 4,500,000 -5,500,000 -12,400,000 4,100,000 -3,100,000 2,700,000 
          prepaid expenses
        3,200,000 -11,400,000 4,900,000 2,900,000 5,400,000 -12,400,000 700,000 5,300,000 3,600,000 -10,700,000 2,700,000 5,000,000 -1,200,000 -6,600,000 4,700,000 5,300,000 1,200,000 -5,900,000 -1,100,000 1,100,000 2,400,000 -6,700,000 1,800,000 1,800,000 2,100,000 -5,600,000 2,700,000 -100,000 -100,000 -3,100,000 300,000 3,400,000 -100,000 -9,000,000 1,000,000 2,200,000 -1,000,000 3,500,000 -3,900,000 200,000 700,000 -2,200,000 2,400,000 100,000 1,500,000 -3,300,000 500,000 1,500,000 1,700,000 -4,000,000 2,200,000 -400,000 300,000 -700,000 800,000 -300,000  1,400,000                               
          accounts payable and accrued liabilities
        -17,700,000 -2,700,000 16,400,000 -19,500,000 -27,000,000 9,100,000 42,000,000 -35,900,000 -19,700,000 30,300,000 -19,500,000 -9,700,000 -28,000,000 15,300,000 18,000,000 19,000,000 1,900,000 31,600,000 19,300,000 19,100,000 20,200,000 18,200,000 15,500,000 -43,600,000 -36,000,000 13,800,000 19,800,000 500,000 -10,900,000 6,200,000 20,200,000 -22,600,000 34,600,000 6,200,000 2,600,000 8,400,000 31,400,000 -2,400,000 13,100,000 7,000,000 -21,100,000 -2,900,000 1,500,000 10,000,000 -33,100,000 20,500,000 2,900,000 -1,500,000 -21,400,000 -8,300,000 17,700,000 -13,800,000 -13,000,000 20,500,000 -6,900,000 -6,100,000 -13,900,000 900,000 7,100,000 -7,800,000 4,200,000 -3,300,000 -3,100,000 -9,300,000 34,000,000 10,500,000 11,100,000 -2,500,000 -10,500,000 -7,600,000 2,200,000 6,100,000 13,200,000 5,800,000 -5,200,000 -1,400,000 4,200,000 4,500,000 3,700,000 -19,800,000 14,000,000 2,600,000 -14,900,000 4,300,000 7,600,000 -3,400,000 -9,600,000 -3,600,000 
          plant closure provisions
        1,500,000 -3,000,000 -300,000 1,800,000 -400,000   -100,000 5,200,000 -700,000 -200,000 -300,000 800,000    100,000 -900,000 -400,000 -200,000 300,000 -300,000 8,400,000 100,000    400,000 600,000 1,200,000 1,100,000 700,000 900,000 900,000 900,000 1,100,000 400,000 600,000 600,000 300,000 2,700,000 900,000 500,000 2,600,000 100,000 -1,100,000 300,000                              -900,000 600,000 -3,100,000 -400,000 600,000 2,900,000 -1,000,000 -400,000 -400,000 -600,000  
          income taxes
        400,000  3,000,000 -27,200,000 4,300,000  1,600,000 -8,900,000 8,800,000                                                                                 
          other assets and liabilities
        1,700,000 -1,500,000 -3,200,000 -2,800,000 -1,200,000 -700,000 4,500,000 -300,000 1,300,000 -1,700,000 -100,000 2,300,000 -300,000 -400,000 200,000 -2,000,000 200,000 700,000 2,700,000 -1,800,000 -2,100,000 -300,000 1,700,000 -2,200,000   -800,000 -1,000,000 1,500,000 -700,000 -200,000 1,200,000                                                        
          net cash from operating activities
        17,600,000 61,400,000 39,300,000 9,300,000 28,300,000 25,700,000 73,500,000 4,700,000 80,600,000 72,400,000 58,100,000 55,000,000 21,800,000 78,400,000 39,800,000   68,800,000 2,800,000 -1,100,000 22,700,000 58,200,000 55,500,000 29,800,000 2,400,000 58,400,000 40,000,000   69,800,000   -2,000,000 47,500,000    17,700,000 29,800,000 50,400,000 6,600,000 27,100,000 35,500,000 36,900,000 18,200,000 47,300,000 25,200,000 12,900,000 20,900,000  -5,800,000 19,700,000 17,900,000 -2,700,000 33,700,000 12,300,000 18,000,000 13,800,000 9,400,000 5,800,000 5,700,000 15,800,000 22,000,000 12,000,000 8,400,000   18,300,000 27,300,000   -16,600,000 19,800,000 25,600,000 20,100,000 -6,800,000 9,000,000 16,100,000    27,900,000 19,500,000 -13,900,000 10,300,000 500,000 19,200,000 17,200,000 38,800,000 
          cash flows from investing activities
                                                                                                 
          capital expenditures
        -8,900,000 -14,600,000 -14,300,000 -13,000,000 -8,400,000 -12,100,000 -7,700,000 -10,900,000 -10,700,000 -16,900,000 -12,600,000 -14,900,000 -17,700,000 -12,500,000 -9,700,000   -11,700,000 -7,900,000 -9,200,000 -10,300,000 -8,000,000 -7,100,000 -6,800,000 -7,800,000 -7,300,000 -6,400,000   -8,900,000   -3,800,000 -6,900,000    -4,300,000 -4,700,000 -4,400,000 -3,100,000 -5,600,000 -4,700,000 -3,900,000 -3,400,000 -4,000,000 -3,500,000 -3,600,000 -2,400,000  -1,700,000 -2,700,000 -2,200,000 -3,100,000 -2,300,000 -1,600,000 -1,800,000 -1,100,000 -1,900,000 -2,500,000 -1,500,000 -2,500,000 -2,700,000 -2,200,000 -1,400,000   -1,200,000 -2,100,000   -2,600,000 -1,700,000 -3,600,000 -3,700,000 -3,000,000 -1,900,000 -4,200,000    -3,300,000 100,000 -3,200,000 -1,900,000 -2,900,000 -1,200,000 -900,000 -1,100,000 
          free cash flows
        8,700,000 46,800,000 25,000,000 -3,700,000 19,900,000 13,600,000 65,800,000 -6,200,000 69,900,000 55,500,000 45,500,000 40,100,000 4,100,000 65,900,000 30,100,000   57,100,000 -5,100,000 -10,300,000 12,400,000 50,200,000 48,400,000 23,000,000 -5,400,000 51,100,000 33,600,000   60,900,000   -5,800,000 40,600,000    13,400,000 25,100,000 46,000,000 3,500,000 21,500,000 30,800,000 33,000,000 14,800,000 43,300,000 21,700,000 9,300,000 18,500,000  -7,500,000 17,000,000 15,700,000 -5,800,000 31,400,000 10,700,000 16,200,000 12,700,000 7,500,000 3,300,000 4,200,000 13,300,000 19,300,000 9,800,000 7,000,000   17,100,000 25,200,000   -19,200,000 18,100,000 22,000,000 16,400,000 -9,800,000 7,100,000 11,900,000    24,600,000 19,600,000 -17,100,000 8,400,000 -2,400,000 18,000,000 16,300,000 37,700,000 
          internally developed software
        -5,100,000 -6,600,000 -7,800,000 -3,600,000 -7,200,000 -8,700,000 -4,100,000 -4,400,000 -3,700,000 -4,300,000 -4,100,000 -2,400,000 -4,300,000             -400,000 -200,000 -500,000 -400,000 -800,000 -600,000        -1,600,000 -1,900,000 -2,400,000 -2,700,000                                             
          proceeds on disposal of property, plant and equipment
        300,000 700,000 -100,000 400,000 100,000 200,000 100,000 100,000 100,000     100,000    2,500,000 100,000                            100,000 100,000                       200,000            
          net cash from investing activities
        -13,700,000 -19,200,000 -24,200,000 -16,200,000 -15,500,000 -20,600,000 -11,700,000 -15,400,000 -14,300,000 -55,800,000 -16,700,000 -17,300,000 -22,000,000 -15,100,000 -9,600,000 -9,000,000 -8,400,000 -9,200,000 -7,800,000 -8,900,000 -10,300,000 -8,000,000 -7,100,000 -6,800,000 -7,800,000 -7,300,000 -6,800,000 -5,700,000 -11,200,000 -9,300,000 -9,100,000 -12,500,000 -4,600,000 -7,500,000 -9,000,000     -2,800,000 1,800,000   -6,300,000 -6,800,000          -4,200,000   -4,200,000 -2,400,000 -2,600,000 -1,500,000               -31,400,000 -1,900,000    -1,100,000 -600,000 -300,000 -3,600,000 -23,300,000 -81,700,000 -6,500,000 400,000 -1,300,000 
          cash flows from financing activities
                                                                                                 
          non-controlling interest
        400,000 900,000 -200,000 400,000 800,000 700,000 900,000 600,000 200,000  100,000   -100,000      100,000                 -100,000                                               
          issue of treasury stock
        100,000 100,000 200,000 200,000 1,300,000 100,000 700,000 200,000 700,000 100,000 200,000 1,900,000 8,100,000 300,000 1,200,000 500,000 1,000,000 400,000 100,000 700,000 -100,000 300,000 1,000,000 100,000 1,000,000 5,800,000 1,000,000 1,800,000 100,000 200,000 300,000 700,000 100,000 300,000 3,100,000 300,000 400,000 400,000 100,000 500,000 200,000 200,000 500,000 100,000     100,000 1,500,000 300,000 200,000 800,000 2,400,000 700,000 1,300,000 300,000 400,000 1,000,000 100,000 200,000 100,000 1,000,000 600,000 1,400,000 3,300,000 800,000 
          repurchase of common stock
        -7,100,000 -10,600,000 -8,500,000 -4,800,000 -300,000 -400,000 -100,000 -700,000 -300,000 -900,000 -2,300,000 -1,800,000 -900,000 -200,000 -600,000 -2,100,000 -200,000 -100,000 -200,000 -1,900,000 -200,000 -100,000 -1,100,000 -100,000 -100,000 -900,000 -200,000 -8,200,000 100,000 -4,000,000 -5,100,000 -6,300,000 -6,000,000 -100,000 -600,000 -200,000 -600,000 -1,800,000 -1,300,000 -100,000 -900,000 -400,000 -8,600,000 -15,400,000 -700,000 -3,400,000 -2,500,000 -100,000 -100,000     -2,800,000 -7,700,000 -2,600,000 -7,400,000 -7,000,000 -3,000,000 -900,000 -5,000,000   -500,000 -500,000   -1,000,000    
          net cash from financing activities
        -6,600,000 -20,600,000 -10,800,000 -28,700,000 -3,800,000 -17,800,000 900,000 -18,900,000 500,000 -20,400,000 200,000 -19,200,000 400,000 -17,000,000 -400,000 -17,200,000 900,000 -6,800,000 100,000 -13,000,000 -300,000 -12,000,000 -40,200,000 -33,000,000 -1,600,000 -86,100,000 -28,600,000 -61,700,000 -1,500,000  -200,000 -1,400,000 -5,800,000 -15,500,000 -20,600,000 200,000 -30,500,000  -11,300,000 -7,000,000 -32,300,000 -10,900,000 -8,100,000 -12,200,000 -5,100,000          -5,600,000   -65,400,000 26,600,000 6,100,000 -22,300,000               39,300,000 -75,400,000 -700,000 -2,200,000 -4,700,000 200,000 -23,400,000 19,200,000 -2,300,000 22,000,000 35,000,000 -1,200,000 3,500,000 -21,800,000 
          effect of foreign currency exchange rate changes on cash
        -700,000 100,000 -100,000 2,400,000 1,600,000 -1,900,000 900,000 -300,000 -400,000 300,000 -300,000 -100,000 200,000 300,000 -700,000 -500,000 300,000 -200,000   -400,000 500,000 200,000 100,000 -600,000 400,000 -400,000 -100,000 -100,000 -500,000 300,000 200,000 200,000 600,000 600,000 -600,000 100,000 -800,000 400,000 -200,000 500,000 -1,400,000 -700,000 -1,000,000   100,000 -100,000 -200,000   200,000 -100,000 -500,000                               
          net change in cash and cash equivalents
        -3,400,000 21,700,000 4,200,000 -33,200,000 10,600,000 -14,600,000 63,600,000 -29,900,000 66,400,000 -3,500,000 41,300,000 18,400,000 400,000 46,600,000 29,100,000 -34,200,000 -36,200,000 52,600,000 -5,200,000 -22,600,000 11,700,000 38,700,000 8,400,000 -9,900,000 -7,600,000 -34,600,000 4,200,000 -17,400,000 400,000 31,700,000 25,400,000 -12,100,000 -12,100,000 24,700,000 16,700,000 3,400,000 -56,500,000 -65,200,000 13,900,000 39,800,000 -23,500,000 9,200,000 62,300,000 18,900,000 4,900,000 -48,800,000 -1,000,000 1,300,000 9,900,000 26,300,000 -800,000 11,500,000 20,800,000 -107,200,000 23,800,000 14,600,000 15,000,000 -55,900,000 33,100,000 9,100,000 -17,200,000 8,300,000 25,100,000 9,500,000 -4,400,000 18,400,000 5,700,000 9,000,000 21,600,000 -1,300,000 -1,200,000 2,300,000 -10,200,000 -4,000,000 -6,500,000 100,000 -67,200,000 10,000,000 26,100,000 6,100,000 -9,200,000 4,300,000 36,600,000 -17,600,000 12,300,000 -43,500,000 10,400,000 21,800,000 17,800,000 
          cash and cash equivalents at beginning of period
        292,500,000  289,200,000  203,700,000  147,100,000  141,800,000  105,300,000  75,700,000  123,100,000  90,200,000  101,900,000  136,900,000  41,600,000  80,200,000  22,400,000  76,200,000  107,100,000  68,600,000  13,900,000  24,300,000  101,900,000  68,900,000  33,300,000 46,100,000 4,000,000 
          cash and cash equivalents at end of period
        289,100,000  4,200,000 -33,200,000 299,800,000  63,600,000 -29,900,000 270,100,000  41,300,000 18,400,000 147,500,000  29,100,000 -34,200,000 105,600,000  -5,200,000 -22,600,000 117,000,000  8,400,000 -9,900,000 68,100,000  4,200,000 -17,400,000 123,500,000  25,400,000 -12,100,000 78,100,000  16,700,000 3,400,000 45,400,000  13,900,000 39,800,000 113,400,000  63,400,000 17,800,000 46,500,000  -1,000,000 1,300,000 90,100,000  -800,000 11,500,000 43,200,000  23,800,000 14,600,000 91,200,000  33,100,000 9,100,000 89,900,000  25,100,000 9,500,000 64,200,000  5,700,000 9,000,000 35,500,000  -1,200,000 2,300,000 14,100,000  -6,500,000 100,000 34,700,000  26,100,000 6,100,000 59,700,000  36,600,000 -17,600,000 45,600,000 -43,500,000 10,400,000 67,900,000 21,800,000 
          net income
         47,400,000 12,900,000 23,500,000 32,800,000 -70,400,000 33,400,000 31,200,000 41,400,000 37,800,000 39,200,000 28,900,000 33,200,000 25,500,000 38,700,000 32,300,000 36,500,000 23,900,000 23,400,000 22,400,000 23,400,000 22,600,000   33,100,000 31,100,000 30,100,000 22,300,000 28,700,000 20,400,000 20,600,000 21,800,000 22,200,000 -4,800,000 23,300,000 26,100,000 17,200,000 22,100,000 11,400,000 28,900,000 18,900,000 31,500,000 35,600,000 34,500,000 17,900,000 27,900,000 20,800,000 18,500,000 16,900,000 28,700,000 14,000,000 17,100,000 18,000,000 12,700,000 15,500,000 15,500,000 24,600,000 19,600,000 -16,800,000 24,600,000 21,500,000 24,300,000 30,000,000 12,000,000 7,400,000 -300,000 -2,700,000 3,000,000 6,400,000 5,000,000 -600,000 800,000 7,300,000  5,600,000 6,800,000 6,000,000     -7,400,000 -9,100,000   9,100,000 3,200,000 7,200,000 18,400,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                                 
          impairment of property, plant and equipment
                                                                                                
          impairment of intangible assets
                                                                                              
          non-cash movements of defined benefit pension plans
                                                                                                 
          accrued income taxes
                 -5,700,000 1,400,000 -22,400,000 800,000 13,400,000 200,000 -7,600,000 3,400,000 600,000 -2,100,000 -5,400,000 3,700,000 2,600,000 -3,400,000 -11,100,000 1,600,000 -2,000,000 200,000 -5,000,000 4,400,000 300,000 -700,000 -2,900,000 -2,800,000 50,200,000 1,600,000 -8,200,000 3,900,000 -1,100,000 -2,500,000 1,200,000 400,000 1,200,000 300,000 300,000 200,000 4,200,000 4,400,000 -1,700,000 8,000,000 -9,400,000 500,000 -5,200,000 -600,000 -1,000,000 1,200,000 800,000 5,500,000 -6,000,000                               
          unrecognized tax benefits
             -11,000,000 -900,000 -3,100,000 200,000 700,000 100,000 300,000 300,000     -100,000 100,000   500,000 400,000   1,500,000 300,000 400,000 300,000 10,800,000 100,000 600,000    -1,200,000   300,000 -2,700,000 100,000 400,000 -3,200,000 -4,000,000                                         
          business combinations, net of cash acquired
         1,300,000                          400,000      -199,200,000 1,800,000     -99,000,000   -43,800,000 -51,200,000                                      
          repayment of term loan
                                                                 -25,000,000 -15,000,000 -10,000,000 -55,000,000 -20,000,000                 
          refinancing costs
               100,000              -200,000                       -200,000                -100,000 -3,600,000           100,000     -200,000 -300,000 -2,100,000  
          dividend paid
         -21,600,000   -19,800,000   -17,900,000   -16,100,000   -14,800,000   -12,800,000   -12,800,000   -11,000,000   -9,400,000   -7,800,000   -7,600,000   -6,800,000                     -1,200,000                   
          cash and cash equivalents at beginning of year
                                                                                                 
          cash and cash equivalents at end of year
                                                                                                 
          non-cash movements on defined benefit pension plans
          1,300,000 1,300,000  -900,000    -800,000    -600,000    -800,000 -800,000 -800,000  -1,100,000 -1,000,000 -1,200,000  -1,600,000 -1,500,000 -1,600,000  -1,000,000 -1,100,000 -1,100,000  -900,000 -900,000 -900,000  -1,500,000                                                   
          non-cash income of defined benefit pension plans
                                                                                                 
          repayment of finance leases
                                                                                                 
          profit on disposal
                -100,000                                                                                 
          non-cash income on defined benefit pension plans
                -800,000    -800,000    -700,000                                                                         
          proceeds from revolving credit facility
                               82,500,000       20,000,000 10,000,000 18,000,000     45,000,000                                            
          repayments of revolving credit facility
                             -40,000,000   -72,500,000 -26,000,000   -5,000,000 -20,000,000 -30,000,000 -2,000,000 -11,000,000 -2,000,000 -5,000,000    -21,000,000 -27,000,000 -8,000,000                                         
          repayments of finance leases
                      -100,000  -200,000 -100,000 -200,000  -300,000 -300,000 -300,000  -400,000 -300,000 -600,000  -700,000 -700,000 -700,000  -600,000 -500,000 -600,000                                                     
          impairment of tangible assets
                                                                                               
          net cash (used in)/provided by operating activities
                        -29,000,000                   9,000,000 -19,900,000                                                     
          cash contributions to defined benefit pension plans
                                 100,000 -200,000 -300,000 -200,000 -300,000 -200,000 -300,000 -200,000 -300,000 -300,000 -200,000 -300,000 -200,000 -300,000 -300,000 -1,100,000 -2,700,000 -2,500,000 -2,700,000 -2,800,000 -3,000,000 -2,900,000 -2,900,000 -2,900,000 -2,700,000 -2,600,000 -2,800,000 -2,400,000 -2,300,000 -2,400,000 -2,300,000                                 
          repayment of term loans
                                                                                                 
          deferred tax expense
                           7,700,000 100,000 800,000 2,300,000 -6,300,000 700,000  -200,000 -100,000 200,000                                                             
          net (loss)/income
                                                                                            -2,400,000     
          receipt of short-term borrowing
                                                6,800,000                                                 
          loss on disposal of subsidiary
                                              1,400,000                                                 
          foreign exchange loss on liquidation of subsidiary
                                         1,800,000                                                     
          deferred tax (benefit)/expense
                                                                                                 
          acquisition of intangible asset
                                                                                              
          repayment of finance leases and term loans
                                                                                                 
          net cash provided by/(used in) operating activities
                                    13,200,000                                                             
          deferred tax expense/
                                                                                                 
          sale of short-term investments
                                             100,000 1,600,000 3,100,000 1,600,000 1,800,000 1,900,000 1,100,000 800,000 1,700,000 2,100,000 2,000,000 1,600,000 600,000 2,600,000 900,000 700,000 2,300,000 1,800,000 100,000 800,000 1,800,000                               
          (payment)/receipt of term loans
                                                                                                 
          payment for acquisition-related contingent consideration
                                                                                               
          net cash (used in)/provided by financing activities
                                                                                                 
          loss/(profit) on disposal of subsidiary
                                                                                                
          non-cash expense of defined benefit pension plans
                                                -1,600,000 100,000 100,000 100,000 200,000 800,000 1,000,000 1,000,000 1,000,000 400,000 900,000 800,000 900,000                                   
          proceeds from disposal of subsidiary
                                                                                                
          purchase of short-term investments
                                                 -1,400,000 -1,600,000 -1,900,000 -1,800,000 -800,000 -900,000 -2,100,000 -1,200,000 -1,700,000 -2,300,000 -1,900,000 -1,100,000 -1,700,000 -1,500,000   -800,000 -2,300,000                               
          other non-current assets and liabilities
                                           -1,700,000 -500,000 1,800,000 -2,100,000 400,000 700,000 -400,000 -1,700,000 -200,000 400,000 1,900,000 100,000 200,000                                    -1,700,000 -2,600,000 -5,600,000 2,800,000 -3,000,000 
          net cash (used in)/provided by investing activities
                                            -6,700,000 -203,400,000                                    -3,600,000                
          excess tax benefit from stock-based payment arrangements
                                             -800,000 -100,000 -100,000 200,000 -700,000  -100,000 -400,000 -200,000                                         
          repayment of promissory note in civil complaint settlement
                                                                                                
          receipt of term loans
                                                                                                 
          net cash provided by/(used in) financing activities
                                                      -19,500,000 -6,900,000 -8,000,000 45,600,000 64,600,000 -5,000,000 7,600,000    1,000,000                                 
          repayments of finance leases and term loans
                                              -400,000 -200,000 -200,000                                                 
          reclassification of cash to assets held for sale
                                                                                                 
          payment of acquisition-related contingent consideration
                                                -44,000,000                                                 
          impairment of octane additives segment goodwill
                                                         300,000 400,000 300,000 300,000 300,000 300,000 300,000 300,000 300,000 600,000                               
          profit on disposal of subsidiary
                                                                                                
          repayments of term loans
                                                 -200,000 -200,000  -400,000 -200,000 -300,000                                         
          net cash from/(used) in investing activities
                                                                                                 
          excess tax benefit from stock based payment arrangements
                                                         -900,000 -900,000 -500,000 -1,500,000 -100,000 -400,000 -1,500,000 -200,000 100,000 -600,000 -600,000        800,000 -1,200,000 -1,100,000 -1,000,000                 
          fair value of contingent consideration
                                                                                                 
          internally developed software and other costs
                                                     -2,300,000 -3,100,000 -1,500,000 -1,500,000 -400,000 -5,200,000 -1,700,000 -2,100,000                                     
          net cash provided by/(used in) investing activities
                                                      -5,700,000 -4,800,000 -3,000,000 -48,800,000 -59,700,000 -3,100,000 -4,500,000                                     
          (repayment)/issue of promissory note in civil complaint settlement
                                                                                                 
          non-cash issue of treasury stock in civil complaint settlement
                                                                                                
          changes in working capital:
                                                                                                 
          movement on plant closure provisions
                                                          300,000 200,000 100,000   200,000 -400,000 1,600,000 -300,000 -300,000 100,000 -200,000 -500,000     -1,300,000 1,200,000 500,000 -900,000 1,100,000 -500,000   100,000 -400,000             
          movements on unrecognized tax benefits
                                                          100,000 -400,000                                     
          movements on other non-current assets and liabilities
                                                          -200,000 -1,200,000 900,000 700,000 -1,100,000 -1,500,000 600,000 3,500,000 4,800,000 -500,000 -1,600,000                             
          net receipt/(repayment) of revolving credit facility
                                                          65,000,000 -4,000,000 7,000,000    1,000,000     -1,000,000       5,000,000 -19,000,000 15,000,000                   
          net cash (used in) investing activities
                                                                -4,200,000      -2,100,000 -2,000,000 -4,700,000  -1,300,000 -1,200,000 -2,100,000  -2,500,000 -1,300,000 -1,700,000                 
          net cash (used in) financing activities
                                                                      1,000,000 2,000,000 -6,100,000   -8,100,000 -3,600,000   20,600,000 -28,400,000                 
          non-cash issue of promissory note in civil complaint settlement
                                                                                                
          capitalization of internally developed software and other costs
                                                              -2,900,000 -1,000,000 -2,500,000                                 
          net receipt of revolving credit facility
                                                              -1,000,000    42,000,000     2,000,000 4,000,000                         
          repayment of promissory note
                                                                                                 
          cash contributions to defined benefit pension plan
                                                                 -2,600,000 -2,300,000                               
          non-cash expense of defined benefit pension plan
                                                                 700,000 100,000                               
          receipt of term loan
                                                                         50,000,000                     
          deferred income taxes
                                                                  -4,600,000 400,000 200,000 -14,600,000 -1,600,000 1,900,000 -600,000 -400,000 -100,000 1,000,000 -2,900,000 1,200,000 -500,000 -1,700,000 -100,000 -4,400,000 500,000 -500,000 -200,000 -2,100,000 -300,000 100,000 300,000 -3,100,000 -100,000 -1,700,000 -100,000 200,000 100,000 300,000 
          impairment of octane additives business goodwill
                                                                    600,000 500,000 600,000 500,000 600,000 500,000 600,000 500,000 600,000 500,000 1,100,000 1,000,000 1,100,000 2,000,000 2,400,000 3,300,000 4,400,000 7,300,000 10,400,000 7,700,000 11,300,000         
          accounts receivable and prepaid expenses
                                                                    -4,300,000 7,900,000 -1,800,000 -1,500,000 -3,800,000 -8,600,000 4,300,000 9,800,000 -500,000 -2,400,000 2,600,000 2,600,000 -9,600,000 3,900,000 -5,900,000 -2,900,000 3,400,000 -4,900,000 -4,000,000 -5,600,000 9,800,000 -2,400,000 5,300,000 2,800,000 -25,400,000 -10,100,000 15,300,000 12,600,000 
          income taxes and other current liabilities
                                                                    -800,000 3,700,000 4,300,000 -400,000 -7,700,000 13,400,000 3,800,000 -5,200,000 4,500,000 -1,300,000 -6,900,000 -5,100,000 -3,900,000 300,000 -1,800,000 300,000 -2,300,000 2,300,000 6,300,000 -400,000 12,700,000 -7,500,000 -700,000 -14,100,000 -200,000 2,400,000 9,500,000 -3,800,000 7,100,000 
          movement on pension liability
                                                                    -2,200,000 -5,000,000 300,000 -2,300,000 10,400,000                         
          net (repayment)/receipt of revolving credit facility
                                                                    -5,000,000     -10,000,000 -5,000,000                       
          effect of exchange rate changes on cash
                                                                    900,000 -100,000 4,200,000 -2,500,000 -2,000,000 400,000     1,900,000 -400,000 100,000 -600,000 700,000 -1,000,000 1,100,000 -1,400,000 400,000 1,000,000 -600,000  -1,800,000 2,200,000 3,300,000 2,700,000 -1,100,000 700,000 2,100,000 
          (profit)/loss on disposal of property, plant and equipment
                                                                                               
          non-cash intangible asset other adjustments
                                                                                                 
          non-controlling interest dividends
                                                                                                 
          (profit) on disposal of property, plant and equipment
                                                                                                
          excess tax deficiency/(benefit) from stock based payment arrangements
                                                                                                 
          movement on other non-current assets and liabilities
                                                                      -9,400,000 -2,800,000 2,700,000  -1,900,000                       
          purchase of short term investments
                                                                      -1,000,000 -1,700,000 -3,300,000                         
          sale of short term investments
                                                                      1,600,000                           
          excess tax (deficiency)/benefit from stock based payment arrangements
                                                                                                 
          stock option compensation charge/
                                                                        900,000                         
          movement on pension asset/
                                                                           100,000 -1,300,000 -1,200,000 -1,300,000 -1,300,000                 
          stock option compensation charge
                                                                         900,000    1,000,000 1,100,000 1,000,000 1,000,000 1,600,000 400,000 800,000 500,000 400,000 400,000 400,000 400,000         
          movement on deferred income
                                                                                 100,000 -1,900,000 -500,000             
          net cash (used in) by investing activities
                                                                                                 
          payments on capital leases
                                                                                    -100,000             
          noncontrolling interest dividends
                                                                                                 
          stock option compensation (credit)/charge
                                                                           1,200,000 -1,300,000                     
          movement on other non-current liabilities
                                                                            -1,600,000  1,000,000 -1,400,000 -3,100,000                 
          non-cash intangible assets other adjustments
                                                                                                 
          movements on other non-current liabilities
                                                                                                
          disposal of unconsolidated investment
                                                                                                 
          minority interest dividends
                                                                                                 
          dividends paid
                                                                                     -900,000   -800,000   -700,000 
          net repayment of revolving credit facility
                                                                                -2,000,000                 
          net income/
                                                                                                 
          adjustments to reconcile net income/(loss) to net cash from operating activities:
                                                                                                 
          impairment in carrying value of unconsolidated investments
                                                                                                 
          changes in working capital
                                                                                                 
          movement on pension (liability)/prepayment
                                                                                  -900,000 -1,000,000 100,000             
          other
                                                                                          -900,000 900,000 -100,000    -1,200,000 
          repayment of short-term borrowing
                                                                                                 
          receipt of long-term borrowing
                                                                                                 
          repayment of long-term borrowing
                                                                                                 
          increase in deferred finance costs
                                                                                      -100,000           
          minority interest
                                                                                         100,000   -600,000 -400,000 500,000 300,000 
          prepaid disposal costs
                                                                                                 
          receipt of short-term borrowings
                                                                                       800,000 200,000         
          repayment of short-term borrowings
                                                                                   -100,000 -15,000,000             
          receipt of long-term borrowings
                                                                                     14,000,000 2,000,000 2,000,000 119,200,000 20,200,000 -100,000 51,000,000 39,500,000 100,000,000  
          repayment of long-term borrowings
                                                                                   -58,000,000     -140,000,000 -30,000,000 -3,300,000 -400,000 -97,500,000 -18,400,000 
          loss on disposal of business
                                                                                             400,000  
          movement in pension prepayment
                                                                                     -700,000 -800,000 -700,000 -800,000  3,100,000 5,000,000 -700,000     
          movements in other non-current liabilities
                                                                                                 
          movement in deferred income
                                                                                                 
          increase in restricted cash
                                                                                                 
          net income /
                                                                                      10,500,000 1,000,000 600,000         
          adjustments to reconcile net income / (loss) to net cash from operating activities:
                                                                                                 
          (profit) / loss on disposal of property, plant and equipment
                                                                                                 
          impairment of unconsolidated investments
                                                                                                 
          changes in operating assets and liabilities:
                                                                                                 
          other non-current liabilities
                                                                                      -700,000 300,000 -1,500,000 9,600,000 -1,000,000       
          business combinations, net of cash acquired and divestments
                                                                                          -500,000 -500,000 -21,300,000 -74,300,000 -2,300,000 1,400,000  
          disposal of unconsolidated investments
                                                                                                
          net cash from / (used in) investing activities
                                                                                      8,300,000           
          receipt of short-term borrowings repayment of short-term borrowings
                                                                                                 
          repayment of long-term borrowings payments on capital leases
                                                                                                 
          net cash from / (used in) operating activities
                                                                                                 
          prepaid disposal cost
                                                                                                 
          net cash (used) / provided by operating activities
                                                                                        -7,700,000         
          repurchase of treasury stock
                                                                                        -3,100,000         
          adjustments to reconcile net income to cash from operating activities:
                                                                                                 
          loss / (profit) on disposal of equipment
                                                                                                 
          unremitted earnings of affiliated company
                                                                                                 
          pension prepayment
                                                                                                 
          veritel
                                                                                                
          minority interest dividends (paid) and received
                                                                                                 
          net increase in short term borrowings
                                                                                                 
          effect of exchange rate changes on cash and cash equivalents
                                                                                                 
          impairment of tel business goodwill
                                                                                          7,400,000 101,900,000 14,800,000 3,600,000 16,000,000 3,400,000  
          loss / (profit) on disposal of property, plant and equipment
                                                                                                 
          unremitted earnings of affiliates
                                                                                                -300,000 
          loss on disposal of equipment
                                                                                                 
          net decrease in short term borrowings
                                                                                                 
          net decrease/(increase) in short term borrowings
                                                                                                 
          accounts payable and accrued expenses
                                                                                                 
          receipt of short-term credit
                                                                                                 
          proceeds on exercise of stock options