7Baggers

Mercantile Bank Corporation
(NASDAQ:MBWM) 

MBWM stock logo

Mercantile Bank Corporation operates as the bank holding company for Mercantile Bank of Michigan that provides commercial and retail banking services for small- to medium-sized businesses and individuals in the United States. It accepts various deposit products, including checking, savings, and term...

Founded: 1997
Full Time Employees: 618
Sector: Financial Services
Industry: Banks-Regional

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Quarterly
Annual
    Unit: USD2025-12-31 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 2018-12-31 2014-12-31 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 2008-12-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 
                                                    
      interest income
                                                    
      loans, including fees
    70,361,000 75,040,000 73,962,000 71,992,000 73,758,000 75,316,000 72,819,000 71,270,000 68,876,000 65,073,000 62,006,000 57,154,000 53,787,000 43,807,000 36,003,000 33,251,000 34,618,000 33,656,000 33,789,000 32,985,000 35,971,000 33,664,000 34,322,000    41,880,000 13,411,000 12,687,000 12,846,000 13,245,000 13,386,000 13,454,000 13,813,000 14,502,000 14,951,000 16,171,000 16,732,000           
      securities, taxable
    3,583,000 5,041,000 4,679,000 4,239,000 3,670,000 3,140,000 2,656,000 2,444,000 3,070,000 2,109,000 2,207,000 2,131,000 2,035,000 2,005,000 1,898,000 1,665,000 1,547,000 1,341,000 1,204,000 1,035,000 900,000 1,212,000 2,187,000    3,400,000 1,003,000 1,007,000 1,007,000 1,032,000 1,009,000 1,063,000 1,280,000 1,400,000 1,588,000 1,781,000 1,916,000 1,923,000 1,901,000 2,039,000 1,983,000       
      securities, tax-exempt
    1,344,000 1,259,000 1,181,000 1,172,000 1,122,000 1,056,000 968,000 977,000 242,000 1,164,000 904,000 876,000 806,000 697,000 631,000 600,000 591,000 600,000 598,000 597,000 584,000 576,000 562,000    880,000 211,000 257,000 295,000 306,000 319,000 367,000 422,000 437,000 439,000 454,000 475,000 489,000 497,000 544,000 760,000       
      interest-earning deposits
    6,966,000 4,303,000  2,935,000 3,936,000 3,900,000 2,436,000 2,033,000 983,000 2,807,000 801,000 324,000                                     
      total interest income
    82,254,000 85,643,000 81,958,000 80,338,000 82,486,000 83,412,000 78,879,000 76,724,000 73,802,000 71,153,000 65,918,000 60,485,000 58,278,000 48,129,000 39,550,000 35,882,000 37,047,000 35,888,000 35,774,000 34,785,000 37,620,000 35,594,000 37,164,000    46,250,000 14,667,000 13,992,000 14,209,000 14,666,000 14,768,000 14,930,000 15,553,000 16,406,000 17,044,000 18,460,000 19,159,000 20,524,000 21,734,000 22,696,000 23,189,000   35,292,000 36,779,000 36,084,000 36,025,000 
      interest expense
                                                    
      deposits
    24,775,000 26,817,000 25,725,000 25,192,000 26,873,000 27,588,000 24,710,000 22,224,000 19,015,000 16,143,000 12,379,000 7,907,000 4,040,000 2,299,000 1,873,000 1,825,000 1,867,000 2,184,000 2,346,000 2,717,000 3,176,000 3,466,000 3,700,000    1,645,000 2,190,000 2,223,000 2,320,000 2,556,000 2,728,000 2,844,000 3,008,000 3,377,000 4,040,000 4,333,000 4,634,000 5,404,000 5,636,000 5,992,000 6,497,000   18,860,000 19,357,000 19,179,000 18,825,000 
      short-term borrowings
    1,808,000 1,974,000 1,919,000 1,763,000 2,086,000 2,219,000 1,757,000 1,654,000 781,000 693,000 914,000 459,000 141,000 53,000 49,000 50,000 48,000 46,000 40,000 36,000 41,000 38,000 55,000    65,000 19,000 19,000 20,000 27,000 39,000 42,000 49,000 55,000 73,000 116,000 161,000 319,000 394,000 353,000 344,000   895,000 900,000 866,000 832,000 
      federal home loan bank advances
    2,715,000 2,895,000 2,897,000 2,898,000 3,150,000 3,218,000 3,252,000 3,399,000 3,252,000 3,270,000 3,051,000 1,794,000 1,595,000 1,755,000 1,911,000 1,864,000 2,028,000 2,072,000 2,050,000 2,027,000 2,072,000 2,072,000 2,214,000    257,000 141,000 119,000 118,000 122,000 183,000 300,000 389,000 411,000 410,000 606,000 606,000 796,000 1,441,000 1,576,000 1,696,000   1,757,000 1,759,000 1,390,000 1,194,000 
      subordinated debt and other borrowings
    1,457,750 1,955,000 1,938,000 1,937,000 1,567,500 2,095,000 2,088,000 2,086,000 1,512,250 2,086,000 2,023,000  1,073,500 1,646,000 1,391,000                                  
      total interest expense
    31,239,000 33,641,000 32,479,000 31,790,000 34,125,000 35,120,000 31,807,000 29,363,000 25,154,000 22,192,000 18,367,000 12,101,000 7,621,000 5,753,000 5,224,000 4,997,000 4,513,000 4,764,000 4,903,000 5,252,000 5,771,000 6,085,000 6,593,000    3,233,000 2,673,000 2,680,000 2,755,000 2,929,000 3,184,000 3,419,000 3,684,000 4,071,000 4,749,000 5,302,000 5,710,000 6,836,000 7,799,000 8,275,000 8,883,000   22,218,000 22,729,000 22,136,000 21,541,000 
      net interest income
    51,015,000 52,002,000 49,479,000 48,548,000 48,361,000 48,292,000 47,072,000 47,361,000 48,648,000 48,961,000 47,551,000 48,384,000 50,657,000 42,376,000 34,326,000 30,885,000 32,534,000 31,124,000 30,871,000 29,533,000 31,849,000 29,509,000 30,571,000    43,017,000 11,994,000 11,312,000 11,454,000 11,737,000 11,584,000 11,511,000 11,869,000 12,335,000 12,295,000 13,158,000 13,449,000 13,688,000 13,935,000 14,421,000 14,306,000   13,074,000 14,050,000 13,948,000 14,484,000 
      provision for credit losses
    -700,000 200,000 1,600,000 2,100,000 1,500,000 1,100,000 3,500,000 1,300,000 1,800,000 3,300,000 2,000,000 600,000 3,050,000 2,900,000 500,000 100,000                                 
      net interest income after provision for credit losses
    51,715,000 51,802,000 47,879,000 46,448,000 46,861,000 47,192,000 43,572,000 46,061,000 46,848,000 45,661,000 45,551,000 47,784,000 47,607,000 39,476,000 33,826,000 30,785,000                                 
      noninterest income
                                                    
      service charges on deposit and sweep accounts
    2,263,000 2,064,000 1,967,000 1,839,000 1,866,000 1,753,000 1,692,000 1,531,000 1,543,000 1,370,000 1,064,000 976,000 1,463,000 1,579,000 1,495,000 1,416,000 1,391,000 1,324,000 1,209,000 1,155,000                             
      mortgage banking income
    2,421,500 3,066,000 3,969,000 2,651,000 2,172,500 3,325,000 3,023,000 2,343,000 1,457,250 2,779,000 1,835,000 1,216,000 1,747,750 1,764,000 1,947,000 3,281,000 5,762,250 6,554,000 7,695,000 8,800,000 4,936,500 9,479,000 7,640,000                          
      credit and debit card income
    1,730,500 2,371,000 2,350,000 2,201,000 1,661,000 2,257,000 2,266,000 2,121,000 1,679,250 2,232,000 2,426,000 2,060,000 1,525,250 2,086,000 2,134,000 1,881,000 1,386,250 1,947,000 1,920,000 1,678,000 1,092,750 1,636,000 1,374,000                          
      interest rate swap fees
    421,750 377,000 1,230,000 80,000 623,500 389,000 766,000 1,339,000 680,500 937,000 748,000 1,037,000 586,750 566,000 430,000 1,351,000 1,521,500 3,938,000 1,495,000 653,000                             
      payroll services income
    662,000 825,000 783,000 1,040,000 573,750 713,000 686,000 896,000 477,000 591,000 572,000  408,750 533,000 464,000  343,500 412,000 405,000  336,500 399,000 370,000                          
      earnings on bank owned life insurance
    1,332,000 858,000 561,000 543,000 497,000 449,000 437,000 1,172,000 276,000 422,000 402,000 401,000 368,000 238,000 785,000 287,000 292,000 298,000 297,000 277,000 281,000 290,000 307,000    159,000 337,000 350,000 338,000 358,000 378,000 385,000 407,000 437,000 452,000 449,000 439,000 408,000 445,000 454,000 411,000       
      other income
    746,000 827,000 602,000 348,000 542,000 781,000 811,000 1,466,000 1,085,000 524,000 598,000 515,000 502,000 487,000 486,000 423,000 852,000 1,095,000 477,000 343,000 74,000 368,000 248,000    -1,110,000 656,000 657,000 664,000 -1,207,000 584,000 577,000 630,000 -1,085,000 544,000 521,000 573,000 -574,000 585,000 570,000 581,000   -1,889,000 1,105,000 1,028,000 1,019,000 
      total noninterest income
    11,056,000 10,388,000 11,462,000 8,702,000 10,172,000 9,667,000 9,681,000 10,868,000 8,301,000 9,246,000 7,645,000 6,951,000 7,805,000 7,253,000 7,741,000 9,277,000 12,633,000 15,568,000 14,556,000 13,463,000 14,333,000 13,307,000 10,984,000    4,747,000 1,683,000 1,772,000 1,827,000 2,063,000 2,057,000 1,940,000 1,934,000 2,023,000 1,804,000 1,703,000 1,752,000 2,304,000 2,289,000 1,996,000 2,655,000   1,534,000 1,507,000 1,421,000 1,408,000 
      noninterest expense
                                                    
      salaries and benefits
    21,836,000 21,094,000 20,711,000 19,557,000 21,482,000 20,292,000 17,913,000 18,237,000 18,400,000 17,258,000 16,461,000 16,682,000 17,282,000 16,656,000 15,676,000 15,510,000 19,192,000 15,975,000 16,194,000 15,086,000 15,411,000 16,734,000 14,126,000    18,609,000 5,256,000 4,981,000 4,857,000 4,973,000 4,849,000 4,855,000 4,691,000 4,520,000 4,636,000 4,364,000 4,371,000 4,423,000 4,649,000 4,559,000 4,665,000   5,546,000 5,425,000 6,521,000 5,384,000 
      occupancy
    2,116,000 2,122,000 2,155,000 2,118,000 1,988,000 2,146,000 2,220,000 2,289,000 2,521,000 2,241,000 2,098,000 2,289,000 2,194,000 2,001,000 2,084,000 2,104,000 2,067,000 2,030,000 1,977,000 2,014,000 2,006,000 2,023,000 1,862,000    2,716,000 639,000 624,000 658,000 554,000 598,000 671,000 678,000 664,000 707,000 708,000 701,000 669,000 696,000 723,000 750,000   838,000 881,000 814,000 767,000 
      furniture and equipment depreciation, rent and maintenance
    614,500 846,000 826,000 787,000 697,500 938,000 923,000 929,000 648,500 894,000 878,000 822,000 705,500 953,000 935,000 934,000 679,750 929,000 902,000 889,000 625,000 871,000 851,000    188,500 242,000 256,000 256,000 222,000 282,000 299,000 308,000 228,000 305,000 304,000 303,000 290,750 358,000 396,000 409,000       
      data processing costs
    2,828,750 3,945,000 3,599,000 3,770,000 2,535,500 3,437,000 3,415,000 3,289,000 2,270,250 3,038,000 2,881,000 3,162,000 2,300,750 3,139,000 3,091,000 2,973,000 2,034,500 2,746,000 2,775,000 2,617,000 1,948,250 2,676,000 2,633,000                          
      charitable foundation contributions
    760,000 300,000 2,000 3,000 1,001,000  4,000 703,000                                         
      acquisition costs
    1,187,000 606,000                                               
      other expense
    1,591,000 5,837,000 6,086,000 4,869,000 678,000 5,490,000 5,262,000 4,497,000 1,539,000 5,085,000 5,509,000 5,644,000 1,428,000 4,003,000 4,656,000 4,221,000 1,172,000 4,530,000 4,344,000 4,511,000                             
      total noninterest expense
    36,726,000 34,750,000 33,379,000 31,104,000 33,806,000 32,303,000 29,737,000 29,944,000 29,940,000 28,920,000       19,379,750 26,210,000   18,144,750 26,423,000                           
      income before federal income tax expense
    26,045,000 27,440,000 25,962,000 24,046,000 23,227,000 24,556,000 23,516,000 26,985,000 25,209,000 25,987,000 25,367,000 26,136,000 26,871,000 19,973,000 14,625,000 14,320,000 15,220,000 18,582,000 22,335,000 17,579,000 17,741,000 13,193,000 10,739,000    7,772,000 5,455,000 5,771,000 6,197,000 3,463,000 3,856,000 5,847,000 4,149,000           -300,000 3,188,000 2,980,000 6,133,000 
      federal income tax expense
    3,205,000 3,682,000 3,344,000 4,509,000 3,601,000 4,938,000 4,730,000 5,423,000 5,179,000 5,132,000 5,010,000 5,162,000 5,068,000 3,943,000 2,888,000 2,828,000 3,581,000 3,531,000 4,244,000 3,340,000 3,659,000 2,507,000 2,041,000    2,311,000 2,002,000 1,755,000 1,797,000 1,091,250 1,240,000 1,856,000 1,269,000           -395,000 821,000 759,000 1,850,000 
      net income
    22,840,000 23,758,000 22,618,000 19,537,000 19,626,000 19,618,000 18,786,000 21,562,000 20,030,000 20,855,000 20,357,000 20,974,000 21,803,000 16,030,000 11,737,000 11,492,000 11,639,000 15,051,000 18,091,000 14,239,000 14,082,000 10,686,000 8,698,000    5,461,000 3,453,000 4,016,000 4,400,000 3,048,000 2,616,000 3,991,000 2,880,000 30,323,000 3,024,000 2,718,000 1,420,000 -4,953,000 -5,357,000 -363,000 -2,643,000   95,000 2,367,000 2,221,000 4,283,000 
      yoy
    16.38% 21.10% 20.40% -9.39% -2.02% -5.93% -7.72% 2.80% -8.13% 30.10% 73.44% 82.51% 87.33% 6.50% -35.12% -19.29% -17.35% 40.85% 107.99%    59.27%    79.17% 32.00% 0.63% 52.78% -89.95% -13.49% 46.84% 102.82% -712.21% -156.45% -848.76% -153.73%   -482.11% -211.66%       
      qoq
    -3.86% 5.04% 15.77% -0.45% 0.04% 4.43% -12.87% 7.65% -3.96% 2.45% -2.94% -3.80% 36.01% 36.58% 2.13% -1.26% -22.67% -16.80% 27.05% 1.11% 31.78% 22.86%     58.15% -14.02% -8.73% 44.36% 16.51% -34.45% 38.58% -90.50% 902.74% 11.26% 91.41% -128.67% -7.54% 1375.76% -86.27%    -95.99% 6.57% -48.14%  
      basic earnings per share
    1.015 1.46 1.39 1.21 0.93 1.22 1.17 1.34 0.973 1.3 1.27 1.31 0.62 1.01 0.74 0.73 0.738 0.95 1.12 0.87 0.463 0.66 0.54    0.34 0.4 0.46 0.51 0.245 0.3 0.38 0.3 0.18 0.31 0.28    -0.08    0.263 0.28 0.26 0.51 
      diluted earnings per share
    1.015 1.46 1.39 1.21 0.93 1.22 1.17 1.34 0.973 1.3 1.27 1.31 0.62 1.01 0.74 0.73 0.738 0.95 1.12 0.87 0.463 0.66 0.54    0.34 0.4 0.46 0.5 0.238 0.3 0.36 0.28 0.173 0.3 0.27    -0.08    0.263 0.28 0.26 0.5 
      average basic shares outstanding
    4,057,310.75 16,249,267 16,239,919 16,197,978 4,031,676.5 16,138,320 16,122,813 16,118,858 4,001,514.5 16,018,419 16,003,372 15,996,138 3,962,605.5 15,861,551 15,848,681 15,840,801 4,021,201.5 15,859,955 16,116,070 16,283,044 4,066,302 16,233,196 16,212,500    2,176,533.25 8,707,038 8,705,667 8,705,677 2,153,207.75 8,622,719 8,610,181 8,605,484 2,150,663.5 8,604,263 8,604,476    8,505,086    2,112,631 8,458,601 8,455,891 8,436,842 
      average diluted shares outstanding
    4,057,310.75 16,249,267 16,239,919 16,197,978 4,031,676.5 16,138,320 16,122,813 16,118,858 4,001,514.5 16,018,419 16,003,372 15,996,138 3,962,609.75 15,861,551 15,848,681 15,841,037 4,021,318.5 15,860,314 16,116,666 16,283,490 4,066,496.5 16,233,666 16,213,264    2,179,989 8,725,268 8,718,649 8,718,601 2,224,182 8,653,751 9,043,791 8,991,422 2,218,756.25 8,868,122 8,872,692    8,505,086    2,122,056.5 8,491,612 8,503,138 8,518,666 
      interest-earning assets
      2,136,000                                              
      gain on sale of other real estate owned
            97,750 391,000                                       
      charitable foundation contribution
            104,000 404,000 2,000  127,250 4,000 500,000                                  
      total noninterest expenses
              27,829,000 28,599,000 28,541,000 26,756,000 26,942,000 25,742,000   26,192,000 25,117,000   23,216,000    38,292,000 9,922,000 8,813,000 8,584,000 9,181,000 10,185,000 10,604,000 9,654,000 9,496,000 9,975,000 10,443,000 11,581,000 12,182,000 11,899,000 11,442,000 11,634,000   10,008,000 9,569,000 10,039,000 8,739,000 
      subordinated debentures and other borrowings
               1,941,000    1,258,000 570,000 462,000 467,000 472,000 482,000 509,000 624,000                          
      payroll processing
               746,000    638,000    557,000                             
      other interest-earning assets
                1,650,000 1,620,000 1,018,000 366,000 291,000 291,000 183,000 168,000 165,000 142,000 93,000                          
      gain on sale of branch
                      1,058,000                              
      cash dividends per share
                0.235 0.32 0.31 0.31 0.22 0.3 0.29 0.29 0.21 0.28 0.28    0.083 0.12 0.11 0.1               0.103 0.14 0.14 0.14 
      provision for loan losses
                    -3,400,000 1,900,000 -3,100,000 300,000                             
      net interest income after provision for loan losses
                    35,934,000 29,224,000 33,971,000 29,233,000                             
      benefit from loan losses
                        2,500,000 3,200,000 7,600,000    1,700,000 -1,700,000 -1,500,000 -1,500,000 300,000 -400,000 -3,000,000  1,900,000 1,100,000 1,700,000 2,200,000           
      net interest income after benefit from loan losses
                        29,349,000 26,309,000 22,971,000    41,317,000 13,694,000 12,812,000 12,954,000 11,437,000 11,984,000 14,511,000 11,869,000 8,475,500 11,195,000 11,458,000 11,249,000           
      services charges on deposit and sweep accounts
                        850,250 1,135,000 1,045,000                          
      federal funds sold
                              -3,000 38,000 35,000 54,000 76,000 46,000 38,000 32,000 61,000 60,000 48,000 30,000 66,000 41,000 37,000 31,000   77,000 168,000 82,000 93,000 
      interest-bearing deposit balances
                              4,250 4,000 6,000 7,000 7,000 8,000 8,000 6,000 6,000 6,000 6,000            
      other borrowings
                              234,500 323,000 319,000 297,000 224,000 234,000 233,000 238,000 228,000 226,000 247,000 309,000 317,000 328,000 354,000 346,000       
      services charges on accounts
                              288,750 397,000 384,000  285,500 378,000 379,000  307,000 405,000 401,000  341,250 452,000 447,000    296,000 402,000 393,000  
      mortgage banking activities
                              1,001,000 194,000 225,000 252,000 458,000 447,000 275,000 299,000 393,000 195,000 127,000 132,000 516,000 346,000 130,000 100,000       
      rental income from other real estate owned
                              -345,000 99,000 156,000 199,000 255,000 270,000 324,000 212,000 226,000 208,000 205,000 186,000 335,000 362,000 390,000 401,000       
      problem asset costs
                              -198,000 373,000                     
      fdic insurance costs
                              578,000 184,000 175,000 245,000 306,000 294,000 296,000 304,000 569,000 639,000 719,000 916,000 920,000 1,097,000 1,167,000 1,186,000       
      merger-related costs
                              4,668,000 719,000                     
      preferred stock dividends and accretion
                                    703,000 328,000 332,000 342,000 337,000 332,000 329,000 325,000 321,000 320,000       
      net income attributable to common shares
                              5,461,000 3,453,000 4,016,000 4,400,000 3,048,000 2,616,000 3,288,000 2,552,000    1,088,000 -5,282,000 -5,682,000  -2,963,000       
      nonperforming asset costs
                                279,000 131,000 931,000 1,576,000 2,080,000 1,275,000 1,653,000 1,589,000 1,950,000 3,098,000 2,999,000 2,895,000 2,460,000 2,504,000       
      service charges on accounts
                                 374,000    386,000    422,000    466,000      389,000 
      net gain on sales of securities
                                          119,000   476,000       
      gain on sales of commercial loans
                                          81,000 99,000 5,000 220,000       
      income before federal income tax benefit
                                      2,962,000 3,024,000 2,718,000 1,420,000 -2,990,000 -6,075,000 -1,225,000 -3,073,000       
      federal income tax benefit
                                          1,963,000 -718,000 -862,000 -430,000       
      net income available to common shareholders
                                      1,537,750 2,682,000 2,381,000    -684,000        
      short-term investments
                                         6,000 10,000 11,000 10,000 9,000   7,000 5,000 4,000 4,000 
      loans and leases, including fees
                                          18,036,000 19,284,000 20,066,000 20,406,000   32,673,000 34,076,000 33,513,000 33,422,000 
      benefit from loan and lease losses
                                          6,800,000 10,400,000 6,200,000 8,400,000   4,900,000 2,800,000 2,350,000 1,020,000 
      net interest income after benefit from loan and lease losses
                                          4,415,250 3,535,000 8,221,000 5,906,000   8,174,000 11,250,000 11,598,000 13,464,000 
      branch consolidation costs
                                                    
      investment securities
                                                1,880,250 2,530,000 2,485,000 2,506,000 
      long-term borrowings
                                                706,000 713,000 701,000 690,000 
      net gain on sales of commercial loans
                                                    
      furniture and equipment
                                                381,000 529,000 501,000 493,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2025-12-31 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 2018-06-30 2017-06-30 2017-03-31 2016-09-30 2016-06-30 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 2005-12-31 
                                                                   
        assets
                                                                   
        cash and due from banks
      54,755,000 58,593,000 98,900,000 70,320,000 56,991,000 87,766,000 61,863,000 52,606,000 70,408,000 64,551,000 69,133,000 47,151,000 61,894,000 63,105,000 89,167,000 71,480,000 59,405,000 83,804,000 75,893,000 55,489,000 62,832,000 59,283,000 84,516,000 49,781,000 53,262,000 84,275,000 57,675,000 46,322,000 56,338,000 52,847,000 40,313,000 55,882,000 60,087,000 33,207,000 16,789,000 14,382,000 20,302,000 15,311,000 18,405,000 13,642,000 12,402,000 18,890,000 13,988,000 11,277,000 6,674,000 15,854,000 16,521,000 12,606,000 18,896,000 14,445,000 15,601,000 17,155,000 16,754,000 25,694,000 37,632,000 31,903,000 33,099,000 28,764,000 48,190,000 52,098,000  
        interest-earning deposits
      418,569,000 418,426,000  315,140,000 336,019,000 240,780,000 135,766,000 184,625,000  201,436,000 138,663,000 10,787,000 34,878,000 220,909,000 389,938,000 698,724,000 915,755,000 741,557,000 683,638,000 596,855,000 563,174,000 495,308,000 386,711,000 186,938,000 180,469,000 144,263,000 92,750,000 168,572,000 69,402,000 48,762,000 12,663,000 85,848,000 46,896,000                             
        total cash and cash equivalents
      473,324,000 477,019,000 296,072,000 385,460,000 393,010,000 328,546,000 197,629,000 237,231,000 130,533,000 265,987,000 207,796,000 57,938,000 96,772,000 284,014,000 479,105,000 770,204,000 975,160,000 825,361,000 759,531,000 652,344,000 626,006,000 554,591,000 471,227,000 236,719,000 233,731,000 228,538,000 150,425,000 214,894,000 125,740,000 101,609,000 52,976,000 141,730,000 106,983,000 125,918,000 57,977,000 114,777,000 136,003,000 103,995,000 82,466,000 85,008,000 76,372,000 125,703,000 126,999,000 76,888,000 64,198,000 171,996,000 79,883,000 96,433,000 21,735,000 66,675,000 38,902,000 137,286,000 25,804,000 30,601,000 37,769,000 32,440,000  29,298,000 48,441,000 65,766,000  
        securities available for sale
      1,102,230,000 855,138,000 826,415,000 787,583,000 730,352,000 703,375,000 647,907,000 609,153,000 617,092,000 592,305,000 608,972,000 619,973,000 602,936,000 582,999,000 603,638,000 605,661,000 592,743,000 559,564,000 506,125,000 434,257,000 387,347,000 312,424,000 307,661,000 312,147,000 334,655,000 345,533,000 347,924,000 337,876,000 331,142,000 322,258,000 332,441,000 325,443,000 323,452,000 123,793,000 130,134,000 140,013,000 138,314,000 135,660,000 127,591,000 149,981,000 172,992,000 173,134,000 199,785,000 207,321,000 220,830,000 214,343,000 217,117,000 212,949,000 182,492,000 160,880,000 158,996,000 161,484,000 162,669,000 144,019,000 129,013,000 133,978,000  135,243,000 133,247,000 133,346,000  
        mortgage loans held for sale
      17,160,000 17,433,000 27,569,000 15,192,000 15,824,000 29,260,000 22,126,000 14,393,000 18,607,000 10,171,000 11,942,000 3,821,000 3,565,000 14,411,000 12,964,000 14,746,000 16,117,000 47,247,000 27,720,000 40,297,000                                          
        loans
      4,821,888,000 4,615,160,000 4,698,019,000 4,636,549,000 4,600,781,000 4,553,018,000 4,438,245,000 4,322,006,000 4,303,758,000 4,104,376,000 4,051,843,000 3,965,528,000 3,916,619,000 3,880,958,000 3,723,800,000 3,555,790,000 3,453,459,000 3,313,709,000 3,248,841,000 3,364,370,000 3,216,358,000 3,350,544,000 3,333,056,000 2,901,543,000 2,856,667,000 2,933,013,000 2,881,493,000 2,799,639,000 2,636,856,000 2,527,281,000 2,441,314,000 2,406,377,000 2,379,940,000 1,075,487,000 1,058,662,000 1,022,956,000 1,041,189,000 1,035,288,000 1,060,996,000 1,051,674,000 1,072,422,000 1,094,037,000 1,122,999,000 1,206,886,000                  
        allowance for credit losses
      -58,191,000 -59,129,000 -58,375,000 -56,666,000 -54,454,000 -56,590,000 -55,408,000 -51,638,000 -49,914,000 -48,008,000 -44,721,000 -42,877,000 -42,246,000 -39,120,000 -35,974,000 -35,153,000                                              
        premises and equipment
      62,468,000 56,155,000 54,792,000 53,693,000 53,427,000 54,230,000 50,158,000 50,835,000 50,928,000 52,231,000 52,291,000 51,510,000 51,476,000 52,117,000 51,402,000 56,078,000 57,298,000 57,465,000 58,250,000 55,388,000 58,959,000 60,446,000 59,155,000 59,143,000 57,327,000 54,585,000 51,823,000 50,109,000 47,102,000 45,999,000 45,848,000 45,212,000 45,558,000 25,159,000 25,382,000 25,665,000 25,919,000 26,100,000 26,164,000 26,467,000 26,802,000 26,865,000 27,144,000 27,518,000 27,873,000 28,251,000 28,636,000 29,141,000 29,684,000 30,247,000 30,854,000 31,697,000 32,334,000 32,958,000 33,557,000 34,178,000  34,492,000 34,797,000 34,294,000  
        bank owned life insurance
      105,342,000 94,848,000 95,012,000 94,417,000 93,839,000 86,486,000 86,001,000 85,528,000 85,668,000 81,907,000 81,500,000 81,113,000 80,727,000 75,880,000 75,664,000 75,508,000 75,242,000 72,963,000 72,679,000 72,395,000 72,131,000 71,170,000 70,900,000 70,613,000 70,297,000 67,993,000 67,678,000 69,789,000 69,321,000 66,535,000 66,211,000 66,876,000 66,537,000 51,073,000 50,736,000 50,386,000 50,048,000 49,690,000 49,312,000 48,927,000 48,520,000 48,083,000 47,631,000 47,182,000 46,743,000 46,335,000 45,890,000 45,436,000 45,024,000             
        goodwill
      72,656,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000 49,473,000                             
        core deposit intangible
      20,388,000         212,000 291,000 424,000 583,000 741,000 900,000 1,112,000 1,351,000 1,589,000 1,827,000 2,118,000 2,436,000 2,754,000 3,072,000 3,443,000 3,840,000 4,237,000 4,634,000 5,084,000 6,514,000 8,712,000 9,321,000 10,592,000 11,228,000                             
        other assets
      217,954,000 180,877,000 170,498,000 153,986,000 148,396,000 147,816,000 144,744,000 127,459,000 125,566,000 120,845,000 96,687,000 91,250,000 94,993,000 97,740,000 79,862,000 64,759,000 54,267,000 56,462,000 50,879,000 47,246,000 44,599,000 36,778,000 34,079,000 31,132,000 32,812,000 33,420,000 28,740,000 30,023,000 32,504,000 28,728,000 30,375,000 27,761,000 25,849,000 6,710,000 6,558,000 14,745,000 15,310,000 15,532,000 15,719,000 15,483,000 14,994,000 15,379,000 16,592,000 17,144,000 18,553,000 23,458,000 24,585,000 25,632,000 26,745,000 48,598,000 38,250,000 30,588,000 26,303,000 28,307,000 26,022,000 24,766,000  18,787,000 20,310,000 14,954,000  
        total assets
      6,835,219,000 6,308,487,000 6,180,988,000 6,141,200,000 6,052,161,000 5,917,127,000 5,602,388,000 5,465,953,000 5,353,224,000 5,251,012,000 5,137,587,000 4,895,874,000 4,872,619,000 5,016,934,000 5,058,555,000 5,175,899,000 5,257,749,000 4,964,412,000 4,757,414,000 4,710,354,000 4,437,344,000 4,420,610,000 4,314,379,000 3,657,387,000 3,632,915,000 3,710,380,000 3,576,139,000 3,551,754,000 3,288,521,000 3,143,336,000 3,018,919,000 3,063,964,000 2,999,936,000 1,422,003,000 1,343,750,000 1,385,355,000 1,422,926,000 1,388,364,000 1,385,245,000 1,401,596,000 1,433,229,000 1,477,985,000 1,537,874,000 1,576,935,000 1,632,421,000 1,813,383,000 1,804,062,000 1,902,923,000 1,906,208,000 2,017,350,000 2,071,372,000 2,239,764,000 2,208,010,000 2,207,359,000 2,163,354,000 2,115,948,000 2,083,846,000 2,106,427,000 2,103,520,000 2,089,577,000  
        liabilities and shareholders' equity
                                                                   
        deposits
                                                                   
        noninterest-bearing
      1,339,666,000 1,182,775,000 1,180,801,000 1,173,499,000 1,264,523,000 1,182,219,000 1,119,888,000 1,134,995,000 1,247,640,000 1,309,672,000 1,371,633,000 1,376,782,000 1,604,750,000 1,716,904,000 1,740,432,000 1,686,203,000 1,677,952,000 1,647,380,000 1,620,829,000 1,605,471,000 1,433,403,000 1,449,879,000 1,445,620,000 956,290,000 924,916,000 967,189,000 918,581,000 857,734,000 884,470,000 800,718,000 757,706,000 731,663,000 733,573,000 216,055,000 197,304,000 189,477,000 190,241,000 166,890,000 164,532,000 151,617,000 147,031,000 144,022,000 144,761,000 136,025,000 112,944,000 111,338,000 126,572,000 118,391,000 121,157,000 108,509,000 122,388,000 112,617,000 110,712,000 109,154,000 131,107,000 121,755,000  121,336,000 124,977,000 130,857,000  
        interest-bearing
      3,944,786,000 3,629,038,000 3,529,671,000 3,508,286,000 3,433,843,000 3,273,679,000 3,026,686,000 2,872,815,000 2,653,278,000 2,591,063,000 2,385,156,000 2,221,236,000 2,108,061,000 2,129,181,000 2,133,461,000 2,290,048,000 2,405,241,000 2,221,611,000 2,050,442,000 2,039,491,000 1,978,150,000 1,922,155,000 1,816,660,000 1,689,126,000 1,765,468,000 1,799,902,000 1,700,628,000 1,753,240,000 1,645,341,000 1,570,003,000 1,520,310,000 1,597,774,000 1,546,145,000 905,454,000 864,011,000 903,313,000 944,963,000 940,676,000 941,098,000 941,817,000 965,044,000 1,041,311,000 1,103,171,000 1,117,619,000 1,160,888,000 1,240,526,000 1,213,588,000 1,301,818,000 1,280,470,000 1,342,459,000 1,356,245,000 1,538,666,000 1,488,863,000 1,466,559,000 1,413,597,000 1,432,995,000  1,519,648,000 1,514,033,000 1,555,300,000  
        total deposits
      5,284,452,000 4,811,813,000 4,710,472,000 4,681,785,000 4,698,366,000 4,455,898,000 4,146,574,000 4,007,810,000 3,900,918,000 3,900,735,000 3,756,789,000 3,598,018,000 3,712,811,000 3,846,085,000 3,873,893,000 3,976,251,000 4,083,193,000 3,868,991,000 3,671,271,000 3,644,962,000 3,411,553,000 3,372,034,000 3,262,280,000  2,690,384,000 2,767,091,000 2,619,209,000 2,610,974,000 2,529,811,000 2,370,721,000 2,278,016,000 2,329,437,000 2,279,718,000 1,121,509,000 1,061,315,000 1,092,790,000 1,135,204,000 1,107,566,000 1,105,630,000 1,093,434,000  1,185,333,000 1,247,932,000 1,253,644,000  1,351,864,000 1,340,160,000 1,420,209,000  1,450,968,000 1,478,633,000 1,651,283,000  1,575,713,000 1,544,704,000 1,554,750,000  1,640,984,000 1,639,010,000 1,686,157,000  
        securities sold under agreements to repurchase
      232,291,000 251,499,000 242,785,000 242,102,000 121,521,000 220,936,000 221,898,000 228,618,000 229,734,000 164,082,000 219,457,000 227,453,000 194,340,000 198,605,000 203,339,000 204,271,000 197,463,000 175,850,000 169,737,000 141,310,000 118,365,000 157,017,000 167,527,000 133,270,000 102,675,000 103,990,000 119,669,000 111,235,000 94,573,000 110,920,000 126,679,000 146,843,000 136,690,000 65,680,000 57,328,000 68,744,000 64,765,000 60,031,000 52,831,000 57,440,000 72,569,000 69,340,000 71,207,000 80,821,000 116,979,000 116,241,000 108,271,000 98,619,000 99,755,000 102,847,000 109,585,000 91,982,000 94,413,000 105,986,000 82,300,000 83,184,000  88,683,000 84,987,000 78,045,000  
        federal home loan bank advances
      326,221,000 346,221,000 356,221,000 366,221,000 387,083,000 417,083,000 427,083,000 447,083,000 467,910,000 457,910,000 467,910,000 377,910,000 308,263,000 338,263,000 362,263,000 382,263,000 374,000,000 394,000,000 394,000,000 394,000,000 394,000,000 394,000,000 394,000,000 394,000,000 354,000,000 364,000,000 374,000,000 384,000,000 230,000,000 245,000,000 205,000,000 178,000,000 178,000,000 45,000,000 35,000,000 35,000,000 35,000,000 35,000,000 35,000,000 45,000,000 45,000,000 45,000,000 45,000,000 65,000,000 65,000,000 160,000,000 160,000,000 190,000,000 205,000,000 225,000,000 235,000,000 260,000,000 270,000,000 285,000,000 285,000,000 230,000,000 118,904,000 135,000,000 135,000,000 90,000,000  
        subordinated debentures
      51,015,000 50,844,000 50,672,000 50,501,000 50,330,000 50,158,000 49,987,000 49,815,000 49,644,000 49,473,000 49,301,000 49,130,000 48,958,000 48,787,000 48,585,000 48,415,000 48,244,000 48,074,000 47,904,000 47,733,000 47,563,000 47,392,000 47,222,000 47,051,000 46,881,000 46,710,000 46,540,000 46,369,000 45,858,000 45,176,000 45,006,000 44,665,000 44,494,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000 32,990,000  32,990,000 32,990,000 32,990,000  
        subordinated notes
      89,657,000 89,571,000 89,486,000 89,400,000 89,314,000 89,228,000 89,143,000 89,057,000 88,971,000 88,885,000 88,800,000 88,714,000 88,628,000 88,542,000 88,457,000 88,428,000 73,646,000                                             
        term note
      30,000,000                                                             
        accrued interest and other liabilities
      96,699,000 100,909,000 99,833,000 102,845,000 121,021,000 100,513,000 116,552,000 106,926,000 93,902,000 106,716,000 76,628,000 70,070,000 78,211,000 80,391,000 53,035,000 39,800,000 24,644,000 25,219,000 22,614,000 23,826,000 24,309,000 18,267,000 18,129,000 19,261,000 22,414,000 21,389,000 16,604,000 15,447,000 13,360,000 14,020,000 16,168,000 15,548,000 16,457,000 6,990,000 6,179,000 6,139,000 6,933,000 6,786,000 7,709,000 4,234,000 4,162,000 6,875,000 8,107,000 5,933,000 5,880,000    7,242,000    17,132,000         
        total liabilities
      6,110,335,000 5,650,857,000 5,549,469,000 5,532,854,000 5,467,635,000 5,333,816,000 5,051,237,000 4,929,309,000 4,831,079,000 4,767,801,000 4,658,885,000 4,428,502,000 4,431,211,000 4,600,673,000 4,629,572,000 4,739,428,000 4,801,190,000 4,512,134,000 4,305,526,000 4,269,111,000 3,995,790,000 3,988,710,000 3,889,158,000 3,238,998,000 3,216,354,000 3,303,180,000 3,176,022,000 3,168,025,000 2,913,602,000 2,785,837,000 2,670,869,000 2,714,493,000 2,655,359,000 1,272,169,000 1,192,812,000 1,235,663,000 1,276,336,000 1,243,806,000 1,235,583,000 1,234,512,000 1,268,230,000 1,341,252,000 1,406,957,000 1,450,121,000 1,506,485,000 1,678,649,000 1,665,019,000 1,764,703,000 1,766,104,000 1,840,059,000 1,889,680,000 2,070,419,000 2,033,638,000 2,036,011,000 1,995,641,000 1,941,653,000 1,907,949,000 1,928,703,000 1,928,989,000 1,914,100,000  
        commitments and contingent liabilities
                                                                   
        shareholders' equity
                                                                   
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at december 31, 2025 and december 31, 2024
                                                                   
        common stock
      349,431,000 303,463,000 302,294,000 300,732,000 299,705,000 298,704,000 297,591,000 296,065,000 295,106,000 293,961,000 292,906,000 291,516,000 290,436,000 289,219,000 288,199,000 286,831,000 285,752,000 285,033,000 293,232,000 299,358,000 302,029,000 301,896,000 300,897,000 299,584,000 305,035,000 304,065,000 306,669,000 305,346,000 311,720,000 308,343,000 307,371,000 304,027,000 303,336,000 163,629,000 164,548,000 165,353,000 166,074,000 166,728,000 172,888,000 172,872,000 172,841,000 172,834,000 172,801,000 172,732,000 172,677,000 172,768,000 172,631,000 172,493,000 172,438,000 172,362,000 172,277,000 172,194,000 172,353,000 172,480,000 172,640,000 173,134,000  176,610,000 176,461,000 176,332,000  
        retained earnings
      399,448,000 382,679,000 364,991,000 348,281,000 334,646,000 320,722,000 306,804,000 293,554,000 277,526,000 262,838,000 247,313,000 232,123,000 216,313,000 199,505,000 188,452,000 181,532,000 174,536,000 167,541,000 157,150,000 143,642,000 134,039,000 124,451,000 118,239,000 114,012,000 107,831,000 98,876,000 90,618,000 83,107,000 74,084,000 50,012,000 45,596,000 43,655,000 38,553,000 -9,264,000 -12,718,000 -16,734,000 -21,134,000 -24,183,000 -26,799,000 -30,087,000 -32,639,000 -62,630,000 -65,312,000 -67,693,000 -68,781,000 -63,500,000 -57,818,000 -57,134,000 -54,170,000 -17,764,000 -12,158,000 -5,770,000 -1,281,000 -1,593,000 -2,672,000 -60,000  2,220,000 1,038,000   
        accumulated other comprehensive gain
      -23,995,000   -40,667,000 -49,825,000 -36,115,000 -53,244,000 -52,975,000 -50,487,000 -73,588,000 -61,517,000  -65,341,000 -72,463,000 -47,668,000  -3,729,000 -296,000 1,506,000                                           
        total shareholders’ equity
      724,884,000 657,630,000 631,519,000 608,346,000 584,526,000 583,311,000 551,151,000 536,644,000 522,145,000 483,211,000 478,702,000 467,372,000 441,408,000 416,261,000 428,983,000 436,471,000 456,559,000 452,278,000 451,888,000 441,243,000 441,554,000 431,900,000 425,221,000 418,389,000 416,561,000 407,200,000 400,117,000 383,729,000 374,919,000 357,499,000 348,050,000 349,471,000 344,577,000 149,834,000 150,938,000 149,692,000 146,590,000 144,558,000 149,662,000 167,084,000 164,999,000 136,733,000 130,917,000 126,814,000 125,936,000 134,734,000 139,043,000 138,220,000 140,104,000 177,291,000 181,692,000 169,345,000 174,372,000 171,348,000 167,713,000 174,295,000  177,724,000 174,531,000 175,477,000  
        total liabilities and shareholders’ equity
      6,835,219,000 6,308,487,000 6,180,988,000 6,141,200,000 6,052,161,000 5,917,127,000 5,602,388,000 5,465,953,000 5,353,224,000 5,251,012,000 5,137,587,000 4,895,874,000 4,872,619,000 5,016,934,000 5,058,555,000 5,175,899,000 5,257,749,000 4,964,412,000 4,757,414,000 4,710,354,000 4,437,344,000 4,420,610,000 4,314,379,000 3,657,387,000 3,632,915,000 3,710,380,000 3,576,139,000 3,551,754,000 3,288,521,000 3,143,336,000 3,018,919,000 3,063,964,000 2,999,936,000 1,422,003,000 1,343,750,000 1,385,355,000 1,422,926,000 1,388,364,000 1,385,245,000 1,401,596,000 1,433,229,000 1,477,985,000 1,537,874,000 1,576,935,000 1,632,421,000 1,813,383,000 1,804,062,000 1,902,923,000 1,906,208,000 2,017,350,000 2,071,372,000 2,239,764,000 2,208,010,000 2,207,359,000 2,163,354,000 2,115,948,000  2,106,427,000 2,103,520,000 2,089,577,000  
        federal home loan bank stock
       21,513,000 21,513,000 21,513,000 21,513,000 21,513,000 21,513,000 21,513,000 21,513,000 21,513,000 21,513,000 17,721,000 17,721,000 17,721,000 17,721,000 17,721,000 18,002,000 18,002,000 18,002,000 18,002,000 18,002,000 18,002,000 18,002,000 18,002,000 18,002,000 18,002,000 18,002,000 18,002,000 11,036,000 11,036,000 9,236,000 8,026,000 8,026,000 11,961,000 11,961,000 11,961,000 11,961,000 11,961,000 11,961,000 11,961,000 11,961,000 11,961,000 11,961,000 14,345,000 14,345,000 15,681,000 15,681,000 15,681,000 15,681,000 15,681,000 15,681,000 15,681,000 15,681,000 15,681,000 14,973,000 12,230,000  7,534,000 7,534,000 7,509,000  
        preferred stock, no par value; 1,000,000 shares authorized; none issued
                                                                   
        accumulated other comprehensive income
       -28,512,000 -35,766,000         -56,267,000    -31,892,000    -1,757,000    4,793,000    -4,724,000   -4,917,000 1,789,000 2,688,000 -4,531,000 -892,000 1,073,000 1,650,000 2,013,000 2,435,000 2,765,000 3,328,000 5,125,000 2,088,000 499,000 825,000 4,312,000 3,137,000 1,827,000 859,000 1,773,000 710,000 2,921,000 3,300,000 461,000 -2,255,000 1,221,000  -1,106,000 -2,968,000 -855,000  
        interest-earning assets
        197,172,000                                                           
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at december 31, 2024 and december 31, 2023
                                                                   
        other interest-earning assets
              60,125,000                                                     
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at december 31, 2023 and december 31, 2022
                                                                   
        federal funds purchased
                 17,207,000                                     2,600,000      16,000,000 15,800,000  3,300,000 9,100,000   
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at december 31, 2022 and december 31, 2021
                                                                   
        allowance for loan losses
                      -35,363,000 -37,423,000 -35,913,000 -38,695,000 -37,967,000 -35,572,000 -32,246,000 -24,828,000 -23,889,000 -24,414,000 -24,053,000 -23,135,000 -21,167,000 -18,295,000 -18,276,000 -17,526,000 -17,110,000 -25,195,000 -24,947,000 -26,035,000 -28,677,000 -27,762,000 -29,689,000 -30,943,000 -36,532,000 -39,351,000 -38,720,000 -42,118,000                  
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at december 31, 2021 and december 31, 2020
                                                                   
        assets held for sale
                         13,159,000                                          
        liabilities held for sale
                         17,280,000                                          
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at december 31, 2020 and december 31, 2019
                                                                   
        accumulated other comprehensive gain/
                          5,486,000 5,553,000 6,085,000  3,695,000 4,259,000 2,830,000                                   
        total depositss
                             2,645,416,000                                      
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at december 31, 2019 and december 31, 2018
                                                                   
        accumulated other comprehensive loss
                                  -10,885,000 -856,000                                
        federal funds sold
                                       86,283,000 35,080,000 89,594,000 104,879,000 78,012,000 53,476,000 61,022,000 54,329,000 97,183,000 103,510,000 56,068,000 47,924,000 146,668,000 53,892,000 74,352,000 1,368,000 50,426,000 20,741,000 90,099,000 8,950,000 4,820,000   8,239,000   13,400,000  
        interest-bearing deposit balances
                                       6,428,000 6,108,000 10,801,000 10,822,000 10,672,000 10,585,000 10,344,000 9,641,000 9,630,000 9,501,000                   
        accrued interest receivable
                                       3,777,000 3,660,000 3,899,000 3,874,000 3,939,000 3,895,000 4,427,000 4,403,000 4,887,000 5,010,000 5,885,000 5,942,000 6,143,000 6,278,000 7,057,000 7,088,000 8,069,000 7,733,000 8,597,000 8,513,000 9,044,000 8,317,000 9,132,000  11,143,000 9,971,000 10,997,000  
        other real estate owned and repossessed assets
                                       3,549,000 3,916,000 6,506,000 6,970,000 11,160,000 11,545,000 13,506,000 15,282,000 17,287,000 18,473,000 15,884,000 16,675,000 21,896,000 23,020,000 23,096,000 26,608,000             
        net deferred tax asset
                                       19,771,000 19,711,000 20,482,000 22,015,000 22,801,000 25,285,000 25,105,000 26,013,000                     
        liabilities and shareholders’ equity
                                                                   
        shareholders’ equity
                                                                   
        other borrowed money
                                          1,444,000 1,433,000 1,423,000 1,414,000 1,434,000 1,714,000 1,721,000 11,733,000 11,804,000 11,831,000 16,836,000 16,829,000 16,890,000 16,867,000 16,850,000 16,825,000 19,528,000 19,393,000 14,245,000 4,086,000  3,839,000 3,653,000 3,480,000  
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at december 31, 2012, and 21,000 shares outstanding at december 31, 2011
                                                                   
        common stock warrant
                                            1,138,000 1,138,000 1,138,000 1,138,000 1,138,000 1,138,000 1,138,000 1,138,000 1,138,000 1,138,000 1,138,000             
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at september 30, 2012 and 21,000 shares outstanding at december 31, 2011
                                                                   
        preferred stock, no par value; 1,000,000 shares authorized; 0 shares outstanding at june 30, 2012, and 21,000 shares outstanding at december 31, 2011
                                                                   
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at march 31, 2012 and at december 31, 2011
                                             20,396,000                      
        total
                                              1,112,075,000    1,273,832,000    1,401,627,000    1,599,575,000         
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding
                                              20,331,000    20,077,000                 
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at september 30, 2011 and december 31, 2010
                                               20,266,000                    
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at june 30, 2011 and december 31, 2010
                                                20,202,000                   
        short-term investments
                                                 9,543,000 9,600,000 9,474,000 9,470,000 9,475,000 1,471,000 1,804,000   100,000    510,000 534,000 251,000 268,000  
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at march 31, 2011 and december 31, 2010
                                                 20,138,000                  
        securities held to maturity
                                                      59,211,000 61,927,000 61,934,000 65,451,000 64,437,000 64,002,000 63,787,000 65,318,000  64,863,000 63,664,000 64,372,000  
        loans and leases
                                                  1,262,630,000 1,329,156,000 1,410,710,000 1,497,624,000 1,539,818,000 1,614,226,000 1,708,524,000 1,778,057,000 1,856,915,000 1,870,799,000 1,840,793,000 1,794,310,000 1,765,465,000     
        allowance for loan and lease losses
                                                  -45,368,000 -43,876,000 -47,738,000 -50,126,000 -47,878,000 -33,443,000 -32,605,000 -31,884,000 -27,108,000 -29,511,000 -31,881,000 -29,957,000 -23,157,000 -24,857,000 -22,800,000 -21,654,000  
        accrued expenses and other liabilities
                                                   5,723,000 6,762,000 6,056,000  11,387,000 16,622,000 17,339,000  16,929,000 20,402,000 20,843,000  23,907,000 24,249,000 23,428,000  
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at september 30, 2010 and december 31, 2009
                                                   20,016,000                
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at june 30, 2010 and december 31, 2009
                                                    19,955,000               
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at march 31, 2010 and december 31, 2009
                                                     19,896,000              
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at december 31, 2009
                                                      19,839,000             
        bank owned life insurance policies
                                                       44,490,000 43,103,000 42,807,000 42,462,000 41,459,000 41,004,000 39,553,000  32,962,000 32,330,000 31,155,000  
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at september 30, 2009
                                                       19,782,000            
        common stock warrants
                                                       1,138,000 1,138,000           
        short term investments
                                                        2,560,000 30,032,000  87,000 137,000 537,000      
        preferred stock, no par value; 1,000,000 shares authorized; 21,000 shares outstanding at june 30, 2009
                                                        19,725,000           
        preferred stock, no par value: 1,000,000 shares authorized, none issued
                                                                   
        preferred stock, no par value; 1,000,000 shares authorized, none issued
                                                                   
        taxable securities
                                                              141,289,000     
        tax-exempt securities
                                                              64,122,000     
        total securities
                                                              205,411,000     
        total earning assets
                                                              1,979,625,000     
        other non-earning assets
                                                              94,279,000     
        interest-bearing demand deposits
                                                              37,143,000     
        savings deposits
                                                              86,009,000     
        money market accounts
                                                              11,706,000     
        time deposits
                                                              1,385,260,000     
        total interest- bearing deposits
                                                              1,520,118,000     
        short-term borrowings
                                                              93,307,000     
        long-term borrowings
                                                              36,610,000     
        total interest- bearing liabilities
                                                              1,768,939,000     
        demand deposits
                                                              115,172,000     
        other liabilities
                                                              23,838,000     
        average equity
                                                              175,897,000     
        total liabilities and equity
                                                              2,083,846,000     
        net interest income
                                                              56,757,000     
        rate spread
                                                              2,330     
        net interest margin
                                                              2,870     
        total loans and leases
                                                               1,796,962,000 1,776,026,000 1,748,838,000  
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-12-31 2025-06-30 2025-03-31 2024-12-31 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 2019-12-31 2018-12-31 2016-09-30 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2010-12-31 2009-12-31 2008-12-31 2007-12-31 
                                           
          cash flows from operating activities
                                           
          net income
        22,840,000 42,155,000 19,537,000 19,626,000 40,348,000 21,562,000 20,030,000 -41,269,813,000 41,311,026,000 20,974,000 61,023,740,000 16,031,000 11,737,000 11,492,000 58,973,618,000 15,051,000 18,092,000 14,239,000 14,082,000,000 10,686,000,000 13,317,000,000 11,574,000,000 7,845,000,000 3,454,000,000 4,016,000,000 4,400,000,000 3,048,000,000 2,616,000,000 3,991,000,000 2,880,000,000 30,323,000,000 -4,953,000,000 15,947,913,000 -6,038,000 8,963,633,000 
          adjustments to reconcile net income to net cash from operating activities:
                                           
          equity in undistributed net income of subsidiary
                                           
          stock-based compensation expense
        821,000 1,723,000 786,000 785,000 1,633,000 742,000 879,000 -1,678,495,000 1,680,147,000 853,000 3,374,602,000 790,000 797,000 811,000 3,782,275,000 448,000 634,000 643,000 223,000,000 736,000,000 732,000,000 647,000,000 285,000,000 118,000,000 118,000,000 118,000,000 40,000,000 5,000,000 5,000,000 4,000,000 -5,000,000 -103,000,000 -465,389,000 499,000 360,916,000 
          stock grants to directors for retainer fees
        434,000 26,000  423,000                               
          change in other assets
                                           
          change in other liabilities
                                           
          net cash from operating activities
        62,771,000   -21,196,000 49,349,000 40,237,000 -53,508,000 -37,393,088,000 37,448,935,000 18,065,000 22,989,207,000 32,796,000   37,098,831,000    21,571,000,000  24,634,000,000 26,845,000,000 6,352,000,000 5,517,000,000 13,152,000,000 3,299,000,000 9,817,000,000 -764,000,000 5,034,000,000 2,934,000,000    13,240,000 20,709,257,000 
          capital expenditures
                   
          free cash flows
        62,771,000   -21,196,000 49,349,000 40,237,000 -53,508,000 -37,393,088,000 37,448,935,000 18,065,000 22,989,207,000 32,796,000   37,098,831,000    21,571,000,000  24,634,000,000 26,845,000,000 6,352,000,000 5,517,000,000 13,152,000,000 3,299,000,000 9,817,000,000 -764,000,000 5,034,000,000 2,934,000,000    13,240,000 20,709,257,000 
          cash flows from investing activities
                                           
          net capital investment into subsidiaries
                                           
          net cash for investing activities
        41,284,000 -177,287,000 -82,025,000  -168,605,000 -13,169,000  145,127,949,000 -145,267,864,000 -57,136,000 -14,497,004,000 -166,597,000 -185,269,000 -151,130,000 -69,683,564,000 -121,686,000 43,175,000 -237,925,000 53,561,000,000 -40,319,000,000 72,705,000,000 -65,957,000,000 -29,140,000,000           -60,718,000 -84,151,178,000 
          cash flows from financing activities
                                           
          employee stock purchase plan
        55,000 27,000 12,000 15,000 24,000 11,000 12,000 -22,967,000 22,990,000 10,000 44,967,000 12,000 11,000 10,000 47,965,000 13,000 11,000 11,000 12,000,000 12,000,000 11,000,000 12,000,000 9,000,000 10,000,000 9,000,000 10,000,000 9,000,000 11,000,000 9,000,000 12,000,000 12,000,000 -42,943,000 56,000 90,975,000 
          dividend reinvestment plan
        183,000 405,000 203,000 201,000 405,000 204,000 221,000 -448,330,000 448,783,000 217,000 866,347,000 218,000 213,000 222,000 876,352,000 237,000 198,000 213,000 204,000,000 206,000,000 188,000,000 665,000,000 170,000,000 17,000,000 16,000,000     -8,989,000 36,000 75,984,000 
          proceeds from term note issuance
                                           
          cash dividends on common stock
                                           
          net cash for financing activities
                               77,567,000,000 -43,846,000,000 -39,193,000,000 31,689,000,000 1,709,000,000 -23,492,000,000 -34,026,000,000 -71,917,000,000     
          net change in cash and cash equivalents
        -74,341,000 -96,938,000 -7,550,000 -199,562,000 67,096,000 106,698,000 -168,879,000 -110,854,785,000 111,062,834,000 -38,834,000 4,754,146,000 -195,091,000 -291,099,000 -204,956,000 1,624,645,000 65,830,000 107,187,000 26,338,000  83,364,000,000   34,747,000,000 67,941,000,000 -56,800,000,000 -21,226,000,000 32,008,000,000 21,529,000,000 -2,542,000,000 8,636,000,000 -49,331,000,000 -107,798,000,000 -40,875,069,000 3,542,000 -21,930,857,000 
          cash and cash equivalents at beginning of period
        -375,590,000 393,010,000 393,010,000 -111,564,000 130,533,000 130,533,000 -78,139,000 -96,675,228,000 96,675,228,000 96,772,000 13,594,840,000 975,160,000 12,119,994,000 626,006,000    136,003,000,000 76,372,000,000 -25,778,196,000 -8,339,000 51,331,559,000 
          cash and cash equivalents at end of period
        -449,931,000 296,072,000 385,460,000 -311,126,000 197,629,000 237,231,000 -247,018,000 -207,530,013,000 207,738,062,000 57,938,000 18,348,986,000 -195,091,000 -291,099,000 770,204,000 13,744,639,000 65,830,000 107,187,000 652,344,000  83,364,000,000   34,747,000,000 67,941,000,000 -56,800,000,000 114,777,000,000 32,008,000,000 21,529,000,000 -2,542,000,000 85,008,000,000 -49,331,000,000 -107,798,000,000 -66,653,265,000 -4,797,000 29,400,702,000 
          adjustments to reconcile net income to net cash from operating activities
                                           
          depreciation and amortization/accretion
         3,064,000                                  
          provision for credit losses
         3,700,000 2,100,000  4,800,000 1,300,000    600,000  2,900,000 500,000 100,000                      
          proceeds from sales of mortgage loans held for sale
         190,367,000 84,337,000  147,849,000 65,603,000  -70,136,677,000 70,254,355,000 25,645,000  59,853,000 55,899,000 79,622,000  157,023,000 163,722,000 189,018,000 172,032,000,000 214,117,000,000 97,965,000,000 23,870,000,000 36,999,000,000 14,491,000,000 13,038,000,000 16,260,000,000 26,480,000,000 24,730,000,000 16,072,000,000 16,431,000,000 21,322,000,000 30,995,000,000 -64,727,218,000   
          origination of mortgage loans held for sale
         -196,413,000 -81,241,000  -146,731,000 -59,297,000  75,943,114,000 -76,063,049,000 -24,951,000  -59,468,000 -52,367,000 -75,046,000  -169,891,000 -143,435,000 -197,245,000 -159,309,000,000 -189,266,000,000 -87,106,000,000 -22,389,000,000 -36,285,000,000 -12,764,000,000 -12,990,000,000 -15,393,000,000 -21,639,000,000 -29,598,000,000 -15,683,000,000 -17,066,000,000 -18,846,000,000 -27,226,000,000 64,691,749,000 -36,740,000  
          net gain from sales of mortgage loans held for sale
         -5,699,000 -2,464,000  -4,637,000 -2,092,000  2,563,957,000 -2,568,050,000 -950,000  -1,832,000 -1,750,000 -3,205,000  -6,659,000 -7,710,000 -9,182,000  -10,199,000,000   -1,173,000,000 -155,000,000 -193,000,000 -202,000,000  -370,000,000 -230,000,000 -253,000,000      
          net gain from sales and valuation write-downs of foreclosed assets
            -290,000 -79,000      -27,000 -7,000 -13,000  7,000 -81,000 -142,000,000 -122,000,000 36,000,000              
          net gain from sale and write-down of former bank premises
            -78,000                               
          earnings on bank owned life insurance
         -1,104,000 -543,000  -1,609,000 -1,172,000  800,776,000 -801,599,000 -401,000  -238,000 -785,000 -287,000  -298,000 -297,000 -277,000 -281,000,000 -290,000,000 -319,000,000 -318,000,000 -349,000,000 -337,000,000 -350,000,000 -338,000,000 -358,000,000 -378,000,000 -385,000,000 -407,000,000 -437,000,000 -408,000,000  -1,272,000  
          net loss on instruments designated at fair value and related derivatives
         210,000 94,000  -104,000 -83,000    180,000                          
          net change in:
                                           
          accrued interest receivable
         -278,000 -1,500,000  -1,169,000 -1,875,000  1,481,869,000 -1,484,053,000 -1,947,000  -3,104,000 -229,000 -1,344,000  -335,000 2,159,000 -971,000 163,000,000 -1,734,000,000 561,000,000 91,000,000 -796,000,000 -117,000,000 239,000,000 -25,000,000 65,000,000 -44,000,000 532,000,000 -24,000,000 484,000,000 201,000,000 -442,575,000 2,171,000 331,172,000 
          other assets
         -28,260,000 -9,493,000  -16,679,000 1,849,000  1,324,985,000 -1,338,131,000 131,000 19,786,407,000 11,342,000 -8,894,000 -2,855,000 19,591,369,000 -6,270,000 -7,732,000 -1,367,000 -4,623,000,000 -1,503,000,000 -473,000,000 551,000,000 -1,434,000,000 1,521,000,000 9,771,000,000 2,159,000,000 -4,443,000,000 2,637,000,000 -628,000,000 629,000,000 172,000,000 6,641,000,000 9,423,593,000 -1,188,000 -736,525,000 
          accrued interest payable and other liabilities
         -20,680,000 -16,262,000  20,113,000 11,004,000  2,892,163,000    3,669,000    2,605,000    138,000,000                
          loan originations and payments
         -97,017,000 -35,656,000  -133,793,000 -17,824,000  135,221,993,000 -135,361,061,000 -48,939,000  -156,912,000 -167,689,000 -102,241,000  -65,224,000 115,849,000 -180,147,000 130,956,000,000 -32,037,000,000 68,792,000,000 -55,386,000,000 -24,850,000,000 -16,799,000,000 -35,212,000,000 14,779,000,000 -11,046,000,000 27,842,000,000 -8,510,000,000 7,951,000,000 13,119,000,000     
          purchases of securities available for sale
         -104,552,000 -51,657,000  -57,592,000 -591,000  11,627,983,000 -11,633,608,000 -7,392,000  -12,560,000 -26,935,000 -51,705,000  -89,061,000 -81,599,000 -87,307,000 -99,563,000,000 -81,489,000,000 -8,731,000,000 -12,935,000,000 -69,541,000,000 -8,519,000,000 -13,989,000,000 -14,984,000,000          
          proceeds from maturities, calls and repayments of securities available for sale
         28,180,000 6,825,000  23,185,000 5,271,000  -10,185,144,000 10,196,297,000 1,703,000  1,621,000 8,787,000 2,854,000  33,006,000 13,551,000 30,974,000 24,269,000,000 75,979,000,000 18,861,000,000 8,373,000,000 65,909,000,000 3,040,000,000 16,224,000,000 12,314,000,000          
          proceeds from sales of foreclosed assets
            290,000 79,000      27,000 7,000 13,000  23,000 158,000 387,000,000 158,000,000 175,000,000 87,000,000 846,000,000 3,020,000,000 2,639,000,000  1,257,000,000 1,782,000,000 9,714,000,000      
          proceeds from sales of fomer bank premises
            278,000                               
          proceeds from bank owned life insurance claims
                                           
          net purchases of premises and equipment and lease activity
         -3,898,000 -1,537,000  -2,330,000 -1,461,000  4,673,859,000 -4,677,492,000 -2,508,000  -1,767,000 -67,000 -332,000  -695,000                    
          net increase in time deposits
         51,158,000 6,796,000  71,902,000 55,606,000  -227,248,704,000 227,443,885,000 87,115,000         -33,905,000,000 -1,308,000,000 -25,114,000,000            160,847,731,000   
          net increase in all other deposits
         -39,052,000 -23,377,000  173,754,000 51,286,000      -52,561,000 -60,227,000 -71,081,000  218,981,000 64,293,000 302,650,000 73,424,000,000 111,062,000,000 -51,593,000,000 -65,585,000,000 14,356,000,000 22,457,000,000 -22,983,000,000 702,000,000 31,084,000,000 22,407,000,000 11,428,000,000 5,467,000,000 4,157,000,000 63,011,000,000 -12,438,679,000   
          net increase in securities sold under agreements to repurchase
         121,264,000 120,581,000  -7,836,000 -1,116,000  -25,147,258,000 25,083,887,000 33,113,000  -4,734,000 -932,000 6,808,000  6,113,000 28,427,000 22,945,000 -38,652,000,000 -10,510,000,000      3,979,000,000     3,229,000,000 738,000,000 -8,428,658,000 -26,738,000 11,989,304,000 
          payoffs and paydowns of federal home loan bank advances
         -50,862,000 -20,862,000                                 
          proceeds from federal home loan bank advances
         20,000,000   10,000,000 10,000,000  -199,800,000,000 199,920,000,000 80,000,000  28,263,000     110,000,000,000    10,000,000,000 10,000,000,000   -4,995,000,000 235,000,000 174,985,000,000 
          payment of cash dividends to common shareholders
         -11,810,000 -5,902,000  -11,070,000 -5,534,000  10,316,338,000 -10,326,836,000 -5,164,000  -4,978,000 -4,817,000 -4,812,000  -4,660,000 -4,584,000 -4,636,000 -4,494,000,000 -4,474,000,000 -4,362,000,000 -16,366,000,000 -2,743,000,000 -1,037,000,000 -950,000,000 -864,000,000       508,406,000   
          net cash from financing activities
         91,130,000 77,451,000  186,352,000 79,630,000          190,526,000 40,412,000 265,684,000 -3,717,000,000 94,988,000,000              51,020,000  
          supplemental disclosures of cash flows information
                                           
          cash paid during the period for:
                                           
          interest
         64,263,000 32,465,000  59,477,000 28,268,000  -27,989,336,000    6,592,000    5,243,000    6,649,000,000   3,202,000,000 2,711,000,000 2,729,000,000 3,339,000,000 2,584,000,000 3,452,000,000 3,285,000,000 4,420,000,000 6,239,000,000 6,462,000,000 -49,571,337,000 60,903,000 87,684,387,000 
          federal income tax
            11,600,000   -13,831,410,000    800,000    2,300,000    2,650,000,000   4,250,000,000             
          net cash from (for) operating activities
         -10,781,000 -2,976,000           27,888,000                      
          depreciation and amortization
          1,647,000  5,480,000 2,773,000  -5,921,143,000 5,926,951,000 3,049,000  3,163,000 3,234,000 3,458,000  3,445,000 3,298,000 3,457,000 3,163,000,000 2,877,000,000 2,556,000,000 2,421,000,000 2,455,000,000 543,000,000 533,000,000 553,000,000 569,000,000 581,000,000 578,000,000 510,000,000 506,000,000 565,000,000 -2,169,423,000 1,973,000 3,079,198,000 
          stock option exercises, net of cashless exercises
                                           
          net proceeds from subordinated notes issuance
                  14,630,355,000                        
          stock grants to directors for retainer fee
             2,000  -316,683,000         45,000,000 38,000,000             
          net loss from sales and valuation write-downs of former bank premises
                       -2,000 -5,000 250,000                  
          net loss from sales and write-downs of fixed assets
                 377,000  -409,000 392,000 -1,000  -66,000 312,000                  
          proceeds from sales of former bank premises
                       265,000   -1,000,000             
          purchases of federal home loan bank stock
               3,788,208,000             -4,950,000,000              
          proceeds from bank owned life insurance death benefits claim
            1,357,000 1,357,000                             
          net decrease in securities sold under agreements to repurchase
                             -8,859,000,000 10,153,000,000     7,200,000,000 -4,609,000,000 -15,129,000,000      
          maturities of federal home loan bank advances
            -50,827,000   40,302,647,000    -24,000,000       -10,000,000,000        -10,000,000,000   49,930,000,000   
          noncash financing and investing activities:
                                           
          transfers from bank premises to other real estate owned
               -599,400,000                           
          transfers from loans to foreclosed assets
               -60,888,000           135,000,000   61,000,000 350,000,000 63,000,000 1,647,000,000 1,313,000,000 1,577,000,000 775,000,000 8,096,000,000 1,644,000,000     
          net increase in federal funds purchased
                                           
          payoffs of and paydowns on federal home loan bank advances
             -30,827,000    -10,353,000                          
          repurchase of common shares
                                           
          net cash (for) from financing activities
              -312,422,000 -218,589,646,000   -3,738,057,000 -61,290,000                        
          net gain on instruments designated at fair value and related derivatives
                                           
          proceeds from federal home loan bank stock redemption
                   281,000                      
          net decrease in all other deposits
               183,458,628,000 -183,351,092,000 -201,908,000                          
          proceeds from stock option exercises, net of cashless exercises
                                 56,000,000 153,000,000        
          transfers from premises and equipment to other assets
                                          
          benefit from credit losses
                                           
          net income from sales and write-downs of fixed assets
                                          
          net (gain) loss on instruments designated at fair value and related derivatives
                                           
          accrued interest and other liabilities
                 -5,495,000    15,156,000    -483,000    11,808,000,000 -796,000,000             
          net change in federal funds purchased
                 17,207,000                          
          net proceeds from stock option exercises
                     36,000                      
          proceeds from subordinated notes issuance
                     14,701,000                      
          net cash from (for) financing activities
                 237,000    -81,714,000         57,535,000,000          167,482,139,000   
          assets
                                           
          cash and cash equivalents
                                           
          investment in bank subsidiary
                                           
          total assets
                                           
          liabilities and shareholders’ equity
                                           
          liabilities
                                           
          subordinated debentures
                                           
          subordinated notes
                                           
          shareholders’ equity
                                           
          total liabilities and shareholders’ equity
                                           
          income
                                           
          interest and dividends from subsidiaries
                                           
          total income
                                           
          expenses
                                           
          interest expense
                                           
          other operating expenses
                                           
          total expenses
                                           
          income before income tax benefit and equity in undistributed net income of subsidiary
                                           
          federal income tax benefit
                                           
          comprehensive income
                                           
          accretion of acquired loans
                       -34,000 -34,000 -34,000 -112,000,000 -112,000,000 -164,000,000 -316,000,000 -1,002,000,000             
          change in fair value of derivative asset
                                           
          change in fair value of derivative liability
                                           
          gain on sale of branch
                                          
          net cash transferred in branch sale
                                          
          net decrease in time deposits
                   24,753,000 -42,131,000 -35,861,000  -21,261,000 -40,620,000 -51,961,000    20,483,000,000  37,737,000,000 -8,492,000,000 -43,116,000,000 -3,446,000,000 -20,471,000,000 768,000,000 -24,108,000,000 -77,415,000,000     
          repurchases of common stock shares
                       -8,947,000                   
          payoffs of federal home loan bank advances
                     -20,000,000                      
          repurchases of common stock
                         -3,538,000                  
          provision for loan losses
                       1,900,000 -3,100,000 300,000                  
          proceeds from stock option exercises
                              227,000,000       18,000,000     
          net cash (for) from operating activities
                                           
          net cash for operating activities
                         -1,421,000                  
          net purchases of premises and equipment
                         -1,603,000  -2,772,000,000   -744,000,000             
          benefit from loan losses
                          2,500,000,000 3,200,000,000 -700,000,000 600,000,000 -1,700,000,000 -1,500,000,000 -1,500,000,000 300,000,000 -400,000,000   1,900,000,000     
          deferred income tax expense
                                           
          net gain on sales of mortgage loans held for sale
                                        712,095,000   
          net gain from sale and write-downs on former bank premises
                                           
          net income from sales and disposals of premises and equipment
                                           
          purchases of bank owned life insurance
                            -2,000,000,000           1,006,882,000   
          proceeds from bank owned life insurance cash value release and death benefits
                                          
          purchases of premises and equipment
                               -116,000,000 -54,000,000 -80,000,000 -156,000,000 -278,000,000 -67,000,000 -70,000,000 -334,000,000 -34,000,000 28,956,000 -604,000 -3,512,597,000 
          mercantile bank corporation
                                           
          consolidated statements of cash flows
                                           
          years ended december 31, 2020, 2019 and 2018
                                           
          net gain from sales and valuation write-downs of former bank premises
                                          
          net cash from/(for) operating activities
                                           
          net (gain) income from sale and write-downs on former bank premises
                                           
          net gain from sales of available for sale securities
                                           
          proceeds from sales of securities available for sale
                              6,405,000,000            
          years ended december 31, 2019, 2018 and 2017
                                           
          net (gain) income from sales and valuation write-downs of former bank premises
                                          
          gain on trust preferred securities repurchase
                                          
          net (gain) income from sales of available for sale securities
                                          
          repurchase of common stock
                                           
          repurchase of trust preferred securities
                                          
          years ended december 31, 2018, 2017 and 2016
                                           
          net income from sales and valuation write-downs of former bank premises
                                           
          years ended december 31, 2017, 2016 and 2015
                                           
          net gain from sales and valuation write-down of foreclosed assets
                                          
          net (gain) income from sales and valuation write-down of former bank premises
                                           
          net income from sales of fixed assets
                                           
          repurchase of common stock shares
                                          
          net income from sales of available for sale securities
                                           
          net sales (purchases) of premises and equipment
                                           
          net gain from sales and valuation write-down of former bank premises
                                          
          net (gain) income from sales of fixed assets
                              3,000,000             
          proceeds from fhlb stock redemption
                                           
          purchases of fhlb stock
                                          
          net (gain) income from sale and valuation write-down of foreclosed assets
                               -129,000,000 -367,000,000 -528,000,000          
          accrued expenses and other liabilities
                               592,000,000 837,000,000 -2,205,000,000  -1,248,000,000 2,828,000,000 72,000,000      
          net cash from (for) investing activities
                               -15,143,000,000         -203,905,433,000   
          net increase in other borrowed money
                               58,000,000 -32,000,000 81,000,000         696,814,000 
          repurchase of preferred stock
                                         
          repurchase of common stock warrant
                                          
          payment of cash dividends on preferred stock
                                  -134,000,000 -99,000,000 -263,000,000  262,475,000   
          net cash from investing activities
                                 14,668,000,000 -9,498,000,000 20,584,000,000 15,916,000,000 39,728,000,000 15,723,000,000     
          preferred stock cash dividend accrued
                                     134,000,000 -1,354,000,000 268,000,000 -133,866,000   
          adjustments to reconcile net income to net cash from (for) operating activities:
                                           
          net gain on sale of mortgage loans held for sale
                                           
          net gain on sale of held to maturity securities
                                           
          gain on sale of commercial loans
                                           
          net (gain) loss on sale and write-down of premises and equipment
                                           
          net income on sale and valuation write-downs of foreclosed assets
                                           
          recognition of unrealized gain on interest rate swaps
                                       1,548,197,000   
          purchases of:
                                           
          securities available for sale
                                  -23,983,000,000 -23,980,000,000 -4,008,000,000 -17,985,000,000 -25,763,000,000 -34,803,000,000 39,910,941,000 -81,586,000 -15,404,045,000 
          proceeds from:
                                           
          maturities, calls and repayments of securities available for sale
                                           
          proceeds from sale of held to maturity securities
                                           
          proceeds from sale of commercial loans
                                           
          proceeds from sale of foreclosed assets
                                           
          maturities and prepayments of federal home loan bank advances
                                        
          maturities of wholesale repurchase agreements
                                          
          supplemental disclosures of cash flow information
                                           
          cash paid during the year for:
                                           
          federal income taxes
                                           
          net income from sale and valuation write-down of foreclosed assets
                                   705,000,000 954,000,000 158,000,000      
          maturities, calls and repayments of available for sale securities
                                   15,743,000,000 26,719,000,000 40,118,000,000      
          redemption of federal home loan bank stock
                                           
          net decrease in other borrowed money
                                   10,000,000 9,000,000 -20,000,000      
          securities held to maturity
                                        1,023,975,000 -752,000 -4,656,665,000 
          maturities, calls and repayments of securities held to maturity
                                           
          decrease in other borrowed money
                                           
          proceeds from issuance of preferred stock and common stock warrant
                                           
          gain from sale of commercial loans
                                           
          net gain from sale of held to maturity securities
                                           
          sales of held to maturity securities
                                           
          proceeds from sales of commercial loans
                                           
          net decrease in federal funds purchased
                                           
          payment of cash dividends on common shares
                                           
          gain on sales of commercial loans
                                           
          net income on sale and valuation write-down of foreclosed assets
                                           
          benefit from loan and lease losses
                                       6,800,000,000 -33,641,000,000 19,300,000 11,067,200,000 
          federal home loan bank stock
                                         -5,240,000  
          loan and lease originations and payments
                                       56,097,000,000 -185,690,709,000 -48,902,000 -66,533,190,000 
          increase in structured repurchase agreements
                                           
          maturities of structured repurchase agreements
                                           
          increase in other borrowed money
                                           
          transfers from loans and leases to foreclosed assets
                                       1,773,000,000 -18,409,683,000 5,751,000 6,414,869,000 
          maturities, calls and repayments of held to maturity securities
                                           
          cash paid in lieu of fractional shares on stock dividend
                                           
          stock option exercises
                                          55,976,000 
          net income on sale and write-down of foreclosed assets
                                           
          earnings on bank owned life insurance policies
                                           
          proceeds from the sales of commercial loans
                                           
          proceeds from the sale of foreclosed assets
                                           
          proceeds from issuance of preferred stock and common stock warrants
                                           
          net gain on sales of mortgage loans
                                           
          pay-offs of federal home loan bank advances
                                           
          payment of cash dividend
                                           
          deferred income tax benefit
                                           
          net gain on sales of commercial loans
                                           
          loss on sale of foreclosed assets
                                           
          purchases of bank owned life insurance policies
                                           
          pay-off of federal home loan bank advances
                                           
          cash dividends
                                           
          proceeds from the sale of mortgage loans held for sale
                                           
          cash flows for investing activities
                                           
          net increase in deposits
                                          -55,723,974,000 
          payment of cash dividends
                                           
          proceeds from sale of mortgage loans held for sale
                                           
          net decrease in deposits
                                           
          benefit from deferred income taxes
                                           
          federal home loan bank stock dividends
                                           
          redemption of fhlb stock
                                           
          cash flows for financing activities
                                           
          loan and leases originations and payments
                                           
          equity compensation expense
                                           
          gain on sale of securities
                                           
          net change in
                                           
          sales of securities available for sale
                                           
          proceeds from issuance of subordinated debentures
                                           
          pay-off of subordinated debentures
                                           
          cash paid during the year for