7Baggers
Quarterly
Annual
    Unit: USD2025-09-30 2024-03-31 2023-06-30 2023-03-31 2022-09-30 2022-06-30 2022-03-31 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 
      
    		                    
      assets
    		                    
      current assets:
    		                    
      cash and cash equivalents
    		408,519,000 269,386,000 312,400,000 222,507,000 404,430,000 161,732,000 159,455,000 78,283,000 72,337,000 92,236,000 139,227,000 161,434,000 238,438,000 227,056,000 212,793,000 152,638,000 249,597,000 181,953,000 233,599,000 238,129,000 
      short-term investments
    		49,405,000                    
      trade accounts receivable, net of allowance for credit losses of 2,542 and 2,396 as of september 30, 2025 and december 31, 2024, respectively
    		289,182,000                    
      inventories
    		210,030,000 246,033,000 270,461,000 266,678,000 178,559,000 167,192,000 161,753,000 124,534,000 144,416,000 108,871,000 108,051,000 124,245,000 143,198,000 184,445,000 162,659,000 172,591,000 164,303,000 145,058,000 121,965,000 58,496,000 
      prepaid expenses and other current assets
    		32,808,000 34,868,000 56,431,000 50,448,000 76,999,000 57,853,000 57,144,000 31,723,000 108,515,000 106,909,000 106,252,000 120,939,000 122,354,000 142,151,000 91,361,000 181,903,000 166,702,000 150,914,000 158,945,000 45,915,000 
      total current assets
    		989,944,000 1,076,509,000 1,078,307,000 1,092,487,000 1,147,397,000 1,108,677,000 1,014,573,000 571,218,000 534,118,000 525,574,000 510,135,000 586,289,000 687,810,000 799,029,000 711,479,000 770,464,000 862,686,000 820,418,000 829,601,000 518,820,000 
      property, plant, and equipment, net of accumulated depreciation and amortization of 759,337 and 667,260 as of september 30, 2025 and december 31, 2024, respectively
    		614,196,000                    
      owned and leased mineral rights, net of accumulated depletion and amortization of 146,498 and 124,965 as of september 30, 2025 and december 31, 2024, respectively
    		421,583,000                    
      other acquired intangibles, net of accumulated amortization of 45,515 and 41,444 as of september 30, 2025 and december 31, 2024, respectively
    		35,808,000                    
      long-term restricted cash
    		125,796,000 121,927,000 71,299,000 50,931,000 31,724,000 24,920,000 118,476,000 84,001,000 92,758,000 85,640,000 96,033,000 124,065,000 109,930,000 101,815,000 122,524,000 209,041,000 216,568,000 233,488,000 227,173,000 36,882,000 
      long-term restricted investments
    		34,201,000 38,055,000 75,961,000 90,428,000 92,384,000 94,794,000               
      deferred income taxes
    		6,981,000 8,284,000 9,422,000 10,497,000 11,723,000 12,934,000 4,993,000 479,000 483,000 474,000     33,065,000 50,516,000 54,466,000 34,438,000 27,179,000 78,744,000 
      other non-current assets
    		116,790,000 113,601,000 104,770,000 106,957,000 93,332,000 94,617,000 96,673,000 126,502,000 134,781,000 148,170,000 149,382,000 221,591,000 220,389,000 212,548,000 204,207,000 189,545,000 198,449,000 188,237,000 183,675,000 38,605,000 
      total assets
    		2,345,299,000 2,460,809,000 2,357,832,000 2,349,117,000 2,259,853,000 2,216,146,000 2,112,999,000 1,675,951,000 1,662,783,000 1,671,641,000 1,680,089,000 1,923,123,000 2,040,238,000 2,291,917,000 2,302,823,000 2,669,888,000 2,779,790,000 2,756,051,000 2,746,058,000 906,625,000 
      liabilities and stockholders’ equity
    		                    
      current liabilities:
    		                    
      current portion of long-term debt
    		2,119,000 3,392,000 3,486,000 3,562,000 1,711,000 1,927,000 2,434,000 7,976,000 29,404,000 29,447,000 28,830,000 44,864,000 30,390,000 29,529,000 28,485,000 28,982,000 28,885,000 43,105,000 42,743,000 4,791,000 
      trade accounts payable
    		83,355,000 151,453,000 106,216,000 122,738,000 101,584,000 100,957,000 109,413,000 90,335,000 97,938,000 97,902,000 58,413,000 75,836,000 70,027,000 93,953,000 98,746,000 98,607,000 89,214,000 109,854,000 114,568,000 79,360,000 
      accrued expenses and other current liabilities
    		165,061,000 186,444,000 185,738,000 189,927,000 203,902,000 200,268,000 223,222,000 160,732,000 154,067,000 134,873,000 140,406,000 153,372,000 161,453,000 146,527,000 154,282,000 148,984,000 157,948,000 150,812,000 147,348,000 56,020,000 
      total current liabilities
    		250,535,000 341,289,000 295,736,000 316,608,000 341,342,000 345,467,000 360,926,000 292,404,000 311,376,000 289,603,000 259,054,000 292,278,000 291,889,000 303,220,000 315,152,000 330,177,000 326,405,000 355,194,000 355,236,000 176,036,000 
      long-term debt
    		2,854,000 6,034,000 7,761,000 8,379,000 2,987,000 2,762,000 248,936,000 497,191,000 550,263,000 550,314,000 553,697,000 552,676,000 597,706,000 623,474,000 564,481,000 563,846,000 580,519,000 540,387,000 545,269,000 361,770,000 
      workers’ compensation and black lung obligations
    		178,233,000 186,023,000 183,003,000 185,204,000 200,827,000 202,402,000 204,470,000 228,858,000 231,029,000 229,691,000 230,081,000 263,517,000 266,390,000 258,712,000 260,778,000 260,070,000 245,972,000 248,134,000 249,294,000  
      pension obligations
    		87,995,000 101,800,000 106,844,000 102,700,000 152,184,000 155,467,000 155,895,000 191,888,000 198,549,000 211,722,000 218,671,000 186,089,000 198,582,000 204,605,000 204,086,000 176,389,000 180,274,000 179,444,000 180,802,000  
      asset retirement obligations
    		187,216,000 172,758,000 146,817,000 144,851,000 135,082,000 133,946,000 133,719,000 141,925,000 140,840,000 140,675,000 140,074,000 210,998,000 207,001,000 189,459,000 184,130,000 223,156,000 217,830,000 215,415,000 203,694,000 55,821,000 
      other non-current liabilities
    		20,832,000 20,535,000 17,642,000 18,514,000 20,794,000 20,274,000 22,624,000 29,403,000 28,444,000 27,850,000 28,072,000 54,943,000 50,583,000 27,577,000 31,393,000 35,161,000 40,596,000 39,126,000 52,415,000 61,686,000 
      total liabilities
    		753,175,000 869,665,000 791,098,000 800,542,000 888,184,000 896,573,000 1,183,152,000 1,427,854,000 1,500,452,000 1,501,480,000 1,479,987,000 1,580,155,000 1,630,823,000 1,638,082,000 1,606,701,000 1,800,950,000 1,812,569,000 1,675,407,000 1,674,918,000 667,413,000 
      commitments and contingencies
    		                    
      stockholders’ equity
    		                    
      preferred stock - par value 0.01, 5,000,000 shares authorized, none issued
    		                    
      common stock - par value 0.01, 50,000,000 shares authorized, 22,437,379 issued and 12,919,308 outstanding at september 30, 2025 and 22,383,325 issued and 13,016,390 outstanding at december 31, 2024
    		224,000                    
      additional paid-in capital
    		848,838,000 830,536,000 818,221,000 813,299,000 811,012,000 807,603,000 788,281,000 783,781,000 782,586,000 781,606,000 779,424,000 778,728,000 777,650,000 776,607,000 775,707,000 770,822,000 768,046,000   49,407,000 
      accumulated other comprehensive loss
    		-48,083,000 -39,837,000 -15,891,000 -12,650,000 -60,886,000 -61,704,000 -57,728,000 -98,908,000 -100,321,000 -110,501,000 -111,985,000 -68,614,000 -69,747,000 -62,626,000  -22,140,000 -22,076,000   -1,959,000 
      treasury stock
    		-1,320,825,000 -1,295,639,000 -949,202,000 -791,557,000   -130,068,000 -107,800,000 -107,694,000 -107,694,000  -106,976,000 -106,955,000 -106,913,000       
      retained earnings
    		2,111,970,000 2,095,860,000           -191,739,000 46,562,000       
      total stockholders’ equity
    		1,592,124,000 1,591,144,000          342,968,000 409,415,000 653,835,000       
      total liabilities and stockholders’ equity
    		2,345,299,000 2,460,809,000          1,923,123,000 2,040,238,000 2,291,917,000       
      trade accounts receivable, net of allowance for credit losses of 217 and 234 as of march 31, 2024 and december 31, 2023, respectively
    		 526,222,000                   
      property, plant, and equipment, net of accumulated depreciation and amortization of 588,735 and 558,905 as of march 31, 2024 and december 31, 2023, respectively
    		 607,637,000                   
      owned and leased mineral rights, net of accumulated depletion and amortization of 106,429 and 99,826 as of march 31, 2024 and december 31, 2023, respectively
    		 449,892,000                   
      other acquired intangibles, net of accumulated amortization of 40,218 and 38,543 as of march 31, 2024 and december 31, 2023, respectively
    		 44,904,000                   
      common stock - par value 0.01, 50,000,000 shares authorized, 22,371,165 issued and 13,007,215 outstanding at march 31, 2024 and 22,058,135 issued and 12,938,679 outstanding at december 31, 2023
    		 224,000                   
      trade accounts receivable, net of allowance for credit losses of 205 and 239 as of june 30, 2023 and december 31, 2022, respectively
    		  432,014,000                  
      short-term deposits
    		  7,001,000 6,602,000                6,551,000 
      short-term restricted cash
    		                   8,853,000 
      property, plant, and equipment, net of accumulated depreciation and amortization of 525,470 and 491,186 as of june 30, 2023 and december 31, 2022, respectively
    		  514,859,000                  
      owned and leased mineral rights, net of accumulated depletion and amortization of 89,403 and 77,333 as of june 30, 2023 and december 31, 2022, respectively
    		  452,501,000                  
      other acquired intangibles, net of accumulated amortization of 45,429 and 53,719 as of june 30, 2023 and december 31, 2022, respectively
    		  50,713,000                  
      acquisition-related obligations – current
    		  296,000 381,000 30,131,000 36,211,000 21,281,000 26,266,000 22,866,000 19,879,000  18,206,000 30,019,000        
      preferred stock - par value 0.01, 5.0 million shares authorized, none issued
    		                    
      common stock - par value 0.01, 50.0 million shares authorized, 21.9 million issued and 13.9 million outstanding at june 30, 2023 and 21.7 million issued and 15.5 million outstanding at december 31, 2022
    		  219,000                  
      trade accounts receivable, net of allowance for doubtful accounts of 369 and 239 as of march 31, 2023 and december 31, 2022, respectively
    		   546,252,000                 
      property, plant, and equipment, net of accumulated depreciation and amortization of 503,403 and 491,186 as of march 31, 2023 and december 31, 2022, respectively
    		   486,721,000                 
      owned and leased mineral rights, net of accumulated depletion and amortization of 83,313 and 77,333 as of march 31, 2023 and december 31, 2022, respectively
    		   458,191,000                 
      other acquired intangibles, net of accumulated amortization of 43,236 and 53,719 as of march 31, 2023 and december 31, 2022, respectively
    		   52,905,000                 
      common stock - par value 0.01, 50.0 million shares authorized, 21.8 million issued and 14.8 million outstanding at march 31, 2023 and 21.7 million issued and 15.5 million outstanding at december 31, 2022
    		   218,000                 
      trade accounts receivable, net of allowance for doubtful accounts of 375 and 393 as of september 30, 2022 and december 31, 2021, respectively
    		    487,352,000                
      current assets - discontinued operations
    		    57,000 70,000 69,000 1,391,000 2,157,000 3,216,000 10,935,000     3,401,000 2,059,000 22,806,000 22,475,000 22,179,000 
      property, plant, and equipment, net of accumulated depreciation and amortization of 497,149 and 443,856 as of september 30, 2022 and december 31, 2021, respectively
    		    404,171,000                
      owned and leased mineral rights, net of accumulated depletion and amortization of 73,446 and 52,444 as of september 30, 2022 and december 31, 2021, respectively
    		    423,763,000                
      other acquired intangibles, net of accumulated amortization of 50,259 and 34,221 as of september 30, 2022 and december 31, 2021, respectively
    		    58,561,000                
      non-current assets - discontinued operations
    		    8,521,000 8,508,000 8,526,000 9,477,000 9,477,000 9,476,000 9,473,000          
      current liabilities - discontinued operations
    		    4,014,000 6,104,000 4,576,000 7,095,000 7,101,000 7,502,000 12,306,000     20,439,000 17,298,000 21,854,000 21,892,000 20,850,000 
      acquisition-related obligations - long-term
    		      28,199,000 18,966,000 11,972,000 23,123,000 20,768,000 19,286,000 18,283,000 30,718,000 46,259,000 51,853,000 67,049,000 75,218,000 72,996,000 11,997,000 
      non-current liabilities - discontinued operations
    		    23,245,000 23,321,000 23,390,000 26,740,000 27,496,000 28,028,000 29,090,000     151,998,000 147,016,000 95,000 94,000 103,000 
      common stock - par value 0.01, 50.0 million shares authorized, 21.6 million issued and 16.3 million outstanding at september 30, 2022 and 20.8 million issued and 18.4 million outstanding at december 31, 2021
    		    217,000                
      trade accounts receivable, net of allowance for doubtful accounts of 473 and 393 as of june 30, 2022 and december 31, 2021, respectively
    		     721,830,000               
      property, plant, and equipment, net of accumulated depreciation and amortization of 478,210 and 443,856 as of june 30, 2022 and december 31, 2021, respectively
    		     392,074,000               
      owned and leased mineral rights, net of accumulated depletion and amortization of 66,891 and 52,444 as of june 30, 2022 and december 31, 2021, respectively
    		     429,854,000               
      other acquired intangibles, net of accumulated amortization of 45,716 and 34,221 as of june 30, 2022 and december 31, 2021, respectively
    		     62,702,000               
      common stock - par value 0.01, 50.0 million shares authorized, 21.6 million issued and 17.7 million outstanding at june 30, 2022 and 20.8 million issued and 18.4 million outstanding at december 31, 2021
    		     216,000               
      trade accounts receivable, net of allowance for doubtful accounts of 519 and 393 as of march 31, 2022 and december 31, 2021, respectively
    		      636,152,000              
      property, plant, and equipment, net of accumulated depreciation and amortization of 462,920 and 443,856 as of march 31, 2022 and december 31, 2021, respectively
    		      369,449,000              
      owned and leased mineral rights, net of accumulated depletion and amortization of 59,894 and 52,444 as of march 31, 2022 and december 31, 2021, respectively
    		      436,852,000              
      other acquired intangibles, net of accumulated amortization of 39,968 and 34,221 as of march 31, 2022 and december 31, 2021, respectively
    		      68,450,000              
      common stock - par value 0.01, 50.0 million shares authorized, 21.0 million issued and 18.5 million outstanding at march 31, 2022 and 20.8 million issued and 18.4 million outstanding at december 31, 2021
    		      210,000              
      trade accounts receivable, net of allowance for doubtful accounts of 325 and 293 as of september 30, 2021 and december 31, 2020
    		       335,287,000             
      property, plant, and equipment, net of accumulated depreciation and amortization of 436,205 and 382,423 as of september 30, 2021 and december 31, 2020
    		       356,305,000             
      owned and leased mineral rights, net of accumulated depletion and amortization of 48,968 and 35,143 as of september 30, 2021 and december 31, 2020
    		       449,901,000             
      other acquired intangibles, net of accumulated amortization of 31,349 and 25,700 as of september 30, 2021 and december 31, 2020
    		       78,547,000             
      common stock - par value 0.01, 50.0 million shares authorized, 20.8 million issued and 18.4 million outstanding at september 30, 2021 and 20.6 million issued and 18.3 million outstanding at december 31, 2020
    		       208,000             
      trade accounts receivable, net of allowance for doubtful accounts of 175 and 293 as of june 30, 2021 and december 31, 2020
    		        206,693,000            
      property, plant, and equipment, net of accumulated depreciation and amortization of 418,677 and 382,423 as of june 30, 2021 and december 31, 2020
    		        357,152,000            
      owned and leased mineral rights, net of accumulated depletion and amortization of 45,505 and 35,143 as of june 30, 2021 and december 31, 2020
    		        452,887,000            
      other acquired intangibles, net of accumulated amortization of 32,286 and 25,700 as of june 30, 2021 and december 31, 2020
    		        81,610,000            
      common stock - par value 0.01, 50.0 million shares authorized, 20.8 million issued and 18.4 million outstanding at june 30, 2021 and 20.6 million issued and 18.3 million outstanding at december 31, 2020
    		        208,000            
      trade accounts receivable, net of allowance for doubtful accounts of 470 and 293 as of march 31, 2021 and december 31, 2020
    		         214,342,000           
      property, plant, and equipment, net of accumulated depreciation and amortization of 400,505 and 382,423 as of march 31, 2021 and december 31, 2020
    		         361,120,000           
      owned and leased mineral rights, net of accumulated depletion and amortization of 40,976 and 35,143 as of march 31, 2021 and december 31, 2020
    		         457,416,000           
      other acquired intangibles, net of accumulated amortization of 29,651 and 25,700 as of march 31, 2021 and december 31, 2020
    		         84,245,000           
      common stock - par value 0.01, 50.0 million shares authorized, 20.7 million issued and 18.4 million outstanding at march 31, 2021 and 20.6 million issued and 18.3 million outstanding at december 31, 2020
    		         207,000           
      accumulated deficit
    		         -393,457,000           
      trade accounts receivable, net of allowance for doubtful accounts of 293 and 0 as of december 31, 2020 and 2019
    		          145,670,000          
      property, plant, and equipment, net of accumulated depreciation and amortization of 382,423 and 256,378 as of december 31, 2020 and 2019
    		          363,620,000          
      owned and leased mineral rights, net of accumulated depletion and amortization of 35,143 and 27,548 as of december 31, 2020 and 2019
    		          463,250,000          
      other acquired intangibles, net of accumulated amortization of 25,700 and 26,806 as of december 31, 2020 and 2019
    		          88,196,000          
      acquisition-related obligations - current
    		          19,099,000   33,211,000 33,639,000 33,165,000 33,060,000 26,122,000 27,334,000 13,670,000 
      common stock - par value 0.01, 50.0 million shares authorized, 20.6 million issued and 18.3 million outstanding at december 31, 2020 and 20.5 million issued and 18.2 million outstanding at december 31, 2019
    		          206,000          
      trade accounts receivable, net of allowance for doubtful accounts of 432 and 0 as of september 30, 2020 and december 31, 2019
    		           179,671,000         
      property, plant, and equipment, net of accumulated depreciation and amortization of 395,397 and 314,276 as of september 30, 2020 and december 31, 2019
    		           401,197,000         
      owned and leased mineral rights, net of accumulated depletion and amortization of 40,623 and 27,877 as of september 30, 2020 and december 31, 2019
    		           489,631,000         
      other acquired intangibles, net of accumulated amortization of 38,806 and 32,686 as of september 30, 2020 and december 31, 2019
    		           100,350,000         
      common stock - par value 0.01, 50.0 million shares authorized, 20.6 million issued and 18.3 million outstanding at september 30, 2020 and 20.5 million issued and 18.2 million outstanding at december 31, 2019
    		           206,000         
      retained (deficit) earnings
    		           -260,376,000         
      trade accounts receivable, net of allowance for doubtful accounts of 793 and 0 as of june 30, 2020 and december 31, 2019
    		            183,820,000        
      property, plant, and equipment, net of accumulated depreciation and amortization of 351,561 and 314,276 as of june 30, 2020 and december 31, 2019
    		            423,367,000        
      owned and leased mineral rights, net of accumulated depletion and amortization of 34,961 and 27,877 as of june 30, 2020 and december 31, 2019
    		            495,303,000        
      other acquired intangibles, net of accumulated amortization of 35,717 and 32,686 as of june 30, 2020 and december 31, 2019
    		            103,439,000        
      common stock - par value 0.01, 50.0 million shares authorized, 20.6 million issued and 18.3 million outstanding at june 30, 2020 and 20.5 million issued and 18.2 million outstanding at december 31, 2019
    		            206,000        
      trade accounts receivable, net of allowance for doubtful accounts of 1,213 and 0 as of march 31, 2020 and december 31, 2019
    		             245,377,000       
      property, plant, and equipment, net of accumulated depreciation and amortization of 349,444 and 314,276 as of march 31, 2020 and december 31, 2019
    		             561,836,000       
      owned and leased mineral rights, net of accumulated depletion and amortization of 33,590 and 27,877 as of march 31, 2020 and december 31, 2019
    		             501,061,000       
      other acquired intangibles, net of accumulated amortization of 34,631 and 32,686 as of march 31, 2020 and december 31, 2019
    		             115,628,000       
      common stock - par value 0.01, 50.0 million shares authorized, 20.5 million issued and 18.3 million outstanding at march 31, 2020 and 20.5 million issued and 18.2 million outstanding at december 31, 2019
    		             205,000       
      trade accounts receivable, net of allowance for doubtful accounts of 0 as of december 31, 2019 and 2018
    		              244,666,000      
      property, plant, and equipment, net of accumulated depreciation and amortization of 314,276 and 106,766 as of december 31, 2019 and 2018
    		              583,262,000      
      owned and leased mineral rights, net of accumulated depletion and amortization of 27,877 and 11,390 as of december 31, 2019 and 2018
    		              523,141,000      
      goodwill
    		               124,353,000 101,019,000 107,534,000 95,624,000  
      other acquired intangibles, net of accumulated amortization of 32,686 and 20,267 as of december 31, 2019 and 2018
    		              125,145,000      
      preferred stock - par value 0.01, 5.0 million shares authorized at december 31, 2019 and 2018, none issued
    		                    
      common stock - par value 0.01, 50.0 million shares authorized, 20.5 million issued and 18.2 million outstanding at december 31, 2019 and 20.2 million issued and 19.1 million outstanding at december 31, 2018
    		              205,000      
      trade accounts receivable, net of allowance for doubtful accounts of 0 as of september 30, 2019 and december 31, 2018
    		               259,931,000     
      property, plant, and equipment, net of accumulated depreciation and amortization of 274,704 and 106,766 as of september 30, 2019 and december 31, 2018
    		               614,624,000     
      owned and leased mineral rights, net of accumulated depletion and amortization of 23,877 and 11,390 as of september 30, 2019 and december 31, 2018
    		               572,620,000     
      other acquired intangibles, net of accumulated amortization of 39,820 and 20,267 as of september 30, 2019 and december 31, 2018
    		               138,725,000     
      common stock - par value 0.01, 50.0 million shares authorized, 20.5 million issued and 18.2 million outstanding at september 30, 2019 and 20.2 million issued and 19.1 million outstanding at december 31, 2018
    		               205,000     
      trade accounts receivable, net of allowance for doubtful accounts of 0 as of june 30, 2019 and december 31, 2018
    		                280,025,000    
      property, plant, and equipment, net of accumulated depreciation and amortization of 220,260 and 106,766 as of june 30, 2019 and december 31, 2018
    		                630,654,000    
      owned and leased mineral rights, net of accumulated depletion and amortization of 18,769 and 11,390 as of june 30, 2019 and december 31, 2018
    		                569,394,000    
      other acquired intangibles, net of accumulated amortization of 32,634 and 20,267 as of june 30, 2019 and december 31, 2018
    		                146,554,000    
      common stock - par value 0.01, 50.0 million shares authorized, 20.4 million issued and 19.2 million outstanding at june 30, 2019 and 20.2 million issued and 19.1 million outstanding at december 31, 2018
    		                204,000    
      trade accounts receivable, net of allowance for doubtful accounts of 0 as of march 31, 2019 and december 31, 2018
    		                 319,687,000   
      property, plant, and equipment, net of accumulated depreciation and amortization of 163,603 and 106,766 as of march 31, 2019 and december 31, 2018
    		                 678,549,000   
      operating lease right-of-use assets
    		                 13,025,000   
      owned and leased mineral rights, net of accumulated depletion and amortization of 15,698 and 11,390 as of march 31, 2019 and december 31, 2018
    		                 532,476,000   
      other acquired intangibles, net of accumulated amortization of 26,917 and 20,267 as of march 31, 2019 and december 31, 2018
    		                 147,886,000   
      operating lease liabilities - current
    		                 3,447,000   
      operating lease liabilities - long-term
    		                 9,578,000   
      trade accounts receivable, net of allowance for doubtful accounts of 0 as of december 31, 2018 and december 31, 2017
    		                  292,617,000  
      property, plant, and equipment, net of accumulated depreciation and amortization of 106,766 and 39,943 as of december 31, 2018 and december 31, 2017
    		                  699,990,000  
      owned and leased mineral rights, net of accumulated depletion and amortization of 11,390 and 6,512 as of december 31, 2018 and december 31, 2017
    		                  528,232,000  
      other acquired intangibles, net of accumulated amortization of 20,267 and 28,662 as of december 31, 2018 and december 31, 2017
    		                  154,584,000  
      liabilities held for sale
    		                  1,351,000 1,345,000 
      preferred stock - par value 0.01, 5.0 million shares authorized at december 31, 2018 and 2.0 million shares authorized at december 31, 2017, none issued
    		                    
      trade accounts receivable, net of allowance for doubtful accounts of 0 as of september 30, 2018 and december 31, 2017
    		                   138,697,000 
      assets held for sale
    		                    
      property, plant, and equipment
    		                   218,347,000 
      other acquired intangibles, net of accumulated amortization of 20,760 and 28,662 as of september 30, 2018 and december 31, 2017
    		                   5,990,000 
      long-term deposits
    		                   9,237,000 
      preferred stock - par value 0.01, 2.0 million shares authorized, none issued
    		                    
      common stock - par value 0.01, 20.0 million shares authorized, 10.8 million issued and 9.9 million outstanding at september 30, 2018 and 10.7 million issued and 9.9 million outstanding at december 31, 2017
    		                   108,000 
    The information provided in this report is taken from www.sec.gov and many other data providers. While we have conducted our best efforts to ensure that the parsed data is accurate, we cannot guarantee its accuracy. Please use caution and understand that any consequences of its use are your own responsibility.