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Loans - Risk Category of Loans by Class (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Total | $ 4,044,268 |  | $ 4,044,268 |  | $ 3,977,900
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Total | 599 | $ 849 | 1,660 | $ 2,087 |
Commercial and Industrial Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 57,132 |  | 57,132 |  | 112,673
Year two | 102,806 |  | 102,806 |  | 135,337
Year three | 107,846 |  | 107,846 |  | 86,555
Year four | 80,209 |  | 80,209 |  | 30,101
Year five | 23,593 |  | 23,593 |  | 34,281
Prior | 64,898 |  | 64,898 |  | 49,183
Revolving Loans Amortized Cost Basis | 155,215 |  | 155,215 |  | 141,411
Total | 591,699 |  | 591,699 |  | 589,541
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 4 |  | 911
Year three |  |  | 17 |  | 32
Year four |  |  | 64 |  | 493
Year five |  |  | 0 |  | 7
Prior |  |  | 0 |  | 88
Revolving Loans Amortized Cost Basis |  |  | 46 |  | 261
Total | 29 | 343 | 131 | 1,077 | 1,792
Commercial and Industrial Loans | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 56,965 |  | 56,965 |  | 112,626
Year two | 102,762 |  | 102,762 |  | 134,590
Year three | 107,144 |  | 107,144 |  | 80,738
Year four | 75,968 |  | 75,968 |  | 28,492
Year five | 21,595 |  | 21,595 |  | 32,585
Prior | 60,676 |  | 60,676 |  | 45,764
Revolving Loans Amortized Cost Basis | 150,100 |  | 150,100 |  | 134,936
Total | 575,210 |  | 575,210 |  | 569,731
Commercial and Industrial Loans | Special Mention |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 167 |  | 167 |  | 47
Year two | 44 |  | 44 |  | 453
Year three | 455 |  | 455 |  | 128
Year four | 610 |  | 610 |  | 829
Year five | 1,151 |  | 1,151 |  | 0
Prior | 1,966 |  | 1,966 |  | 1,948
Revolving Loans Amortized Cost Basis | 3,233 |  | 3,233 |  | 3,048
Total | 7,626 |  | 7,626 |  | 6,453
Commercial and Industrial Loans | Substandard |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 294
Year three | 247 |  | 247 |  | 5,689
Year four | 3,631 |  | 3,631 |  | 780
Year five | 847 |  | 847 |  | 1,696
Prior | 2,256 |  | 2,256 |  | 1,471
Revolving Loans Amortized Cost Basis | 1,882 |  | 1,882 |  | 3,427
Total | 8,863 |  | 8,863 |  | 13,357
Commercial and Industrial Loans | Doubtful |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Commercial Real Estate Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 146,095 |  | 146,095 |  | 314,475
Year two | 337,165 |  | 337,165 |  | 419,892
Year three | 413,138 |  | 413,138 |  | 487,582
Year four | 465,006 |  | 465,006 |  | 228,461
Year five | 206,433 |  | 206,433 |  | 148,419
Prior | 566,632 |  | 566,632 |  | 481,090
Revolving Loans Amortized Cost Basis | 37,978 |  | 37,978 |  | 41,916
Total | 2,172,447 |  | 2,172,447 |  | 2,121,835
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 56
Year four |  |  | 0 |  | 0
Year five |  |  | 0 |  | 0
Prior |  |  | 308 |  | 0
Revolving Loans Amortized Cost Basis |  |  | 0 |  | 0
Total | 0 | 0 | 308 | 0 | 56
Commercial Real Estate Loans | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 145,780 |  | 145,780 |  | 300,569
Year two | 322,924 |  | 322,924 |  | 416,874
Year three | 408,533 |  | 408,533 |  | 470,917
Year four | 448,517 |  | 448,517 |  | 225,668
Year five | 204,309 |  | 204,309 |  | 147,431
Prior | 547,354 |  | 547,354 |  | 458,821
Revolving Loans Amortized Cost Basis | 37,087 |  | 37,087 |  | 41,102
Total | 2,114,504 |  | 2,114,504 |  | 2,061,382
Commercial Real Estate Loans | Special Mention |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 315 |  | 315 |  | 13,906
Year two | 13,779 |  | 13,779 |  | 2,401
Year three | 3,353 |  | 3,353 |  | 11,155
Year four | 11,071 |  | 11,071 |  | 1,651
Year five | 2,053 |  | 2,053 |  | 259
Prior | 15,306 |  | 15,306 |  | 19,532
Revolving Loans Amortized Cost Basis | 891 |  | 891 |  | 638
Total | 46,768 |  | 46,768 |  | 49,542
Commercial Real Estate Loans | Substandard |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 462 |  | 462 |  | 617
Year three | 1,252 |  | 1,252 |  | 5,510
Year four | 5,418 |  | 5,418 |  | 1,142
Year five | 71 |  | 71 |  | 729
Prior | 3,972 |  | 3,972 |  | 2,737
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 176
Total | 11,175 |  | 11,175 |  | 10,911
Commercial Real Estate Loans | Doubtful |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Agricultural Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 32,053 |  | 32,053 |  | 46,443
Year two | 40,754 |  | 40,754 |  | 56,455
Year three | 50,350 |  | 50,350 |  | 40,954
Year four | 37,006 |  | 37,006 |  | 47,514
Year five | 44,212 |  | 44,212 |  | 25,755
Prior | 126,785 |  | 126,785 |  | 114,968
Revolving Loans Amortized Cost Basis | 82,582 |  | 82,582 |  | 91,714
Total | 413,742 |  | 413,742 |  | 423,803
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 0
Year four |  |  | 0 |  | 2
Year five |  |  | 0 |  | 0
Prior |  |  | 1 |  | 0
Revolving Loans Amortized Cost Basis |  |  | 0 |  | 25
Total | 1 | 25 | 1 | 25 | 27
Agricultural Loans | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 31,344 |  | 31,344 |  | 44,948
Year two | 39,275 |  | 39,275 |  | 56,291
Year three | 50,204 |  | 50,204 |  | 39,852
Year four | 36,162 |  | 36,162 |  | 42,279
Year five | 39,156 |  | 39,156 |  | 23,217
Prior | 113,052 |  | 113,052 |  | 100,391
Revolving Loans Amortized Cost Basis | 79,839 |  | 79,839 |  | 89,455
Total | 389,032 |  | 389,032 |  | 396,433
Agricultural Loans | Special Mention |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 518 |  | 518 |  | 1,495
Year two | 1,479 |  | 1,479 |  | 164
Year three | 146 |  | 146 |  | 903
Year four | 844 |  | 844 |  | 5,047
Year five | 5,056 |  | 5,056 |  | 2,338
Prior | 9,981 |  | 9,981 |  | 9,894
Revolving Loans Amortized Cost Basis | 2,743 |  | 2,743 |  | 2,259
Total | 20,767 |  | 20,767 |  | 22,100
Agricultural Loans | Substandard |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 191 |  | 191 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 199
Year four | 0 |  | 0 |  | 188
Year five | 0 |  | 0 |  | 200
Prior | 3,752 |  | 3,752 |  | 4,683
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 3,943 |  | 3,943 |  | 5,270
Agricultural Loans | Doubtful |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Leases |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 13,913 |  | 13,913 |  | 36,848
Year two | 31,072 |  | 31,072 |  | 12,281
Year three | 10,279 |  | 10,279 |  | 10,634
Year four | 8,338 |  | 8,338 |  | 6,086
Year five | 3,960 |  | 3,960 |  | 4,788
Prior | 5,174 |  | 5,174 |  | 1,351
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 72,736 |  | 72,736 |  | 71,988
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 0
Year four |  |  | 0 |  | 0
Year five |  |  | 0 |  | 0
Prior |  |  | 0 |  | 0
Revolving Loans Amortized Cost Basis |  |  | 0 |  | 0
Total | 0 | 0 | 0 | 0 | 0
Leases | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 13,913 |  | 13,913 |  | 36,848
Year two | 31,072 |  | 31,072 |  | 12,281
Year three | 10,279 |  | 10,279 |  | 10,634
Year four | 8,338 |  | 8,338 |  | 6,086
Year five | 3,960 |  | 3,960 |  | 4,788
Prior | 5,174 |  | 5,174 |  | 1,351
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 72,736 |  | 72,736 |  | 71,988
Leases | Special Mention |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Leases | Substandard |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Leases | Doubtful |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 0
Year four | 0 |  | 0 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 0 |  | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 0 |  | 0 |  | 0
Consumer Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 22,001 |  | 22,001 |  | 49,282
Year two | 33,596 |  | 33,596 |  | 21,480
Year three | 13,170 |  | 13,170 |  | 9,720
Year four | 7,082 |  | 7,082 |  | 2,756
Year five | 1,843 |  | 1,843 |  | 917
Prior | 2,036 |  | 2,036 |  | 1,912
Revolving Loans Amortized Cost Basis | 1,443 |  | 1,443 |  | 1,786
Total | 81,171 |  | 81,171 |  | 87,853
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one |  |  | 561 |  | 1,162
Year two |  |  | 104 |  | 42
Year three |  |  | 48 |  | 23
Year four |  |  | 37 |  | 71
Year five |  |  | 0 |  | 3
Prior |  |  | 0 |  | 1
Revolving Loans Amortized Cost Basis |  |  | 3 |  | 7
Total | 384 | 284 | 753 | 628 | 1,309
Home Equity Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 285 |  | 285 |  | 417
Year three | 2,872 |  | 2,872 |  | 488
Year four | 371 |  | 371 |  | 150
Year five | 292 |  | 292 |  | 165
Prior | 3,646 |  | 3,646 |  | 1,309
Revolving Loans Amortized Cost Basis | 314,577 |  | 314,577 |  | 297,156
Total | 322,043 |  | 322,043 |  | 299,685
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 35 |  | 0
Year four |  |  | 99 |  | 55
Year five |  |  | 0 |  | 0
Prior |  |  | 0 |  | 24
Revolving Loans Amortized Cost Basis |  |  | 0 |  | 15
Total | 0 | 25 | 134 | 39 | 94
Residential Mortgage Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 32,721 |  | 32,721 |  | 56,317
Year two | 54,170 |  | 54,170 |  | 65,361
Year three | 62,206 |  | 62,206 |  | 86,170
Year four | 80,022 |  | 80,022 |  | 41,639
Year five | 38,731 |  | 38,731 |  | 17,940
Prior | 101,147 |  | 101,147 |  | 95,417
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 368,997 |  | 368,997 |  | 362,844
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one |  |  | 0 |  | 0
Year two |  |  | 0 |  | 0
Year three |  |  | 0 |  | 22
Year four |  |  | 0 |  | 36
Year five |  |  | 0 |  | 0
Prior |  |  | 0 |  | 0
Revolving Loans Amortized Cost Basis |  |  | 0 |  | 0
Total | $ 0 | $ 31 | $ 0 | $ 57 | $ 58

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