v3.26.1
Allowance for Credit Losses - Credit risk profile of loans (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]          
Nonperforming loans past due     90 days    
Current year $ 196,977   $ 196,977   $ 422,989
Prior year 476,113   476,113   448,390
Two years before current year 473,401   473,401   266,301
Three years before current year 268,461   268,461   427,076
Four years before current year 424,896   424,896   357,624
Prior 817,653   817,653   552,346
Revolving Loans 265,689   265,689   230,987
Total loans 2,923,190   2,923,190   2,705,713
Current period gross charge offs, Total 4,084 $ 2,928 7,029 $ 6,169  
Performing          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 229,498   229,498   380,203
Prior year 348,125   348,125   256,443
Two years before current year 234,908   234,908   170,253
Three years before current year 153,285   153,285   166,830
Four years before current year 143,099   143,099   84,682
Prior 263,422   263,422   163,410
Revolving Loans 158,329   158,329   117,651
Total loans 1,530,666   1,530,666   1,339,472
Nonperforming Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 43   43   224
Prior year 521   521   670
Two years before current year 3,646   3,646   719
Three years before current year 1,173   1,173   943
Four years before current year 801   801   357
Prior 1,794   1,794   1,878
Revolving Loans 150   150   458
Total loans 8,128   8,128   5,249
Total other loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 229,541   229,541   380,427
Prior year 348,646   348,646   257,113
Two years before current year 238,554   238,554   170,972
Three years before current year 154,458   154,458   167,773
Four years before current year 143,900   143,900   85,039
Prior 265,216   265,216   165,288
Revolving Loans 158,479   158,479   118,109
Total loans 1,538,794   1,538,794   1,344,721
Residential | First Liens          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 37,513   37,513   64,142
Prior year 71,459   71,459   61,845
Two years before current year 80,889   80,889   39,526
Three years before current year 51,261   51,261   74,359
Four years before current year 77,426   77,426   60,965
Prior 235,608   235,608   145,766
Revolving Loans 8,726   8,726   1,786
Total loans 562,882   562,882   448,389
Current period gross charge offs, 2024     9   33
Current period gross charge offs, 2023         31
Current period gross charge offs, 2021     10    
Current period gross charge offs, Prior     74   11
Current period gross charge offs, Total     93   75
Residential | First Liens | Performing          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 37,513   37,513   64,142
Prior year 71,379   71,379   61,775
Two years before current year 78,667   78,667   39,526
Three years before current year 50,999   50,999   74,359
Four years before current year 77,353   77,353   60,920
Prior 234,219   234,219   144,310
Revolving Loans 8,726   8,726   1,786
Total loans 558,856   558,856   446,818
Residential | First Liens | Nonperforming Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Prior year 80   80   70
Two years before current year 2,222   2,222    
Three years before current year 262   262    
Four years before current year 73   73   45
Prior 1,389   1,389   1,456
Total loans 4,026   4,026   1,571
Residential | Home Equity          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 388   388   338
Prior year 622   622   938
Two years before current year 565   565   793
Three years before current year 774   774   683
Four years before current year 590   590   276
Prior 3,342   3,342   1,459
Revolving Loans 130,203   130,203   102,300
Total loans 136,484   136,484   106,787
Current period gross charge offs, 2023     21    
Current period gross charge offs, 2022         22
Current period gross charge offs, Prior     4   19
Current period gross charge offs, Revolving Loans         10
Current period gross charge offs, Total     25   51
Residential | Home Equity | Performing          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 388   388   338
Prior year 622   622   938
Two years before current year 537   537   793
Three years before current year 467   467   650
Four years before current year 562   562   259
Prior 3,212   3,212   1,284
Revolving Loans 130,076   130,076   101,907
Total loans 135,864   135,864   106,169
Residential | Home Equity | Nonperforming Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Two years before current year 28   28    
Three years before current year 307   307   33
Four years before current year 28   28   17
Prior 130   130   175
Revolving Loans 127   127   393
Total loans 620   620   618
Residential | Junior Liens          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 11,762   11,762   23,832
Prior year 22,626   22,626   13,417
Two years before current year 13,087   13,087   9,561
Three years before current year 9,202   9,202   9,170
Four years before current year 8,909   8,909   4,691
Prior 12,057   12,057   9,775
Revolving Loans 5,473   5,473   2,107
Total loans 83,116   83,116   72,553
Current period gross charge offs, 2024     19   30
Current period gross charge offs, Prior     6   85
Current period gross charge offs, Total     25   115
Residential | Junior Liens | Performing          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 11,762   11,762   23,832
Prior year 22,610   22,610   13,403
Two years before current year 12,803   12,803   9,409
Three years before current year 9,048   9,048   9,145
Four years before current year 8,834   8,834   4,674
Prior 11,970   11,970   9,676
Revolving Loans 5,473   5,473   2,107
Total loans 82,500   82,500   72,246
Residential | Junior Liens | Nonperforming Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Prior year 16   16   14
Two years before current year 284   284   152
Three years before current year 154   154   25
Four years before current year 75   75   17
Prior 87   87   99
Total loans 616   616   307
Residential | All Other Residential          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 6,093   6,093   7,829
Prior year 12,115   12,115   6,807
Two years before current year 4,791   4,791   3,843
Three years before current year 5,151   5,151   4,991
Four years before current year 3,408   3,408   3,622
Prior 3,203   3,203   1,765
Total loans 34,761   34,761   28,857
Current period gross charge offs, Prior     38    
Current period gross charge offs, Total     38    
Residential | All Other Residential | Performing          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 6,093   6,093   7,829
Prior year 12,115   12,115   6,807
Two years before current year 4,298   4,298   3,843
Three years before current year 5,151   5,151   4,991
Four years before current year 3,408   3,408   3,573
Prior 3,202   3,202   1,757
Total loans 34,267   34,267   28,800
Residential | All Other Residential | Nonperforming Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Two years before current year 493   493    
Four years before current year         49
Prior 1   1   8
Total loans 494   494   57
Consumer | Motor Vehicle          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 170,911   170,911   279,508
Prior year 237,997   237,997   168,763
Two years before current year 135,734   135,734   114,456
Three years before current year 86,220   86,220   77,048
Four years before current year 52,236   52,236   14,313
Prior 9,451   9,451   5,569
Revolving Loans 109   109   9
Total loans 692,658   692,658   659,666
Current period gross charge offs, 2025     71   759
Current period gross charge offs, 2024     1,308   2,380
Current period gross charge offs, 2023     960   2,279
Current period gross charge offs, 2022     1,039   4,075
Current period gross charge offs, 2021     1,060   713
Current period gross charge offs, Prior     164   249
Current period gross charge offs, Total     4,602   10,455
Consumer | Motor Vehicle | Performing          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 170,868   170,868   279,286
Prior year 237,587   237,587   168,244
Two years before current year 135,155   135,155   113,956
Three years before current year 85,837   85,837   76,182
Four years before current year 51,613   51,613   14,119
Prior 9,277   9,277   5,441
Revolving Loans 109   109   9
Total loans 690,446   690,446   657,237
Consumer | Motor Vehicle | Nonperforming Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 43   43   222
Prior year 410   410   519
Two years before current year 579   579   500
Three years before current year 383   383   866
Four years before current year 623   623   194
Prior 174   174   128
Total loans 2,212   2,212   2,429
Consumer | All Other Consumer          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 2,874   2,874   4,778
Prior year 3,827   3,827   5,343
Two years before current year 3,488   3,488   2,793
Three years before current year 1,850   1,850   1,522
Four years before current year 1,331   1,331   1,172
Prior 1,555   1,555   954
Revolving Loans 13,968   13,968   11,907
Total loans 28,893   28,893   28,469
Current period gross charge offs, 2025         13
Current period gross charge offs, 2024     35   246
Current period gross charge offs, 2023     75   180
Current period gross charge offs, 2022     19   53
Current period gross charge offs, 2021     14   44
Current period gross charge offs, Prior     70   24
Current period gross charge offs, Revolving Loans     139   201
Current period gross charge offs, Total     352   761
Consumer | All Other Consumer | Performing          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year 2,874   2,874   4,776
Prior year 3,812   3,812   5,276
Two years before current year 3,448   3,448   2,726
Three years before current year 1,783   1,783   1,503
Four years before current year 1,329   1,329   1,137
Prior 1,542   1,542   942
Revolving Loans 13,945   13,945   11,842
Total loans 28,733   28,733   28,202
Consumer | All Other Consumer | Nonperforming Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Current year         2
Prior year 15   15   67
Two years before current year 40   40   67
Three years before current year 67   67   19
Four years before current year 2   2   35
Prior 13   13   12
Revolving Loans 23   23   65
Total loans $ 160   $ 160   $ 267