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Loans and Allowance for Credit Losses - Credit Risk Profile of Loan Portfolio on Amortized Cost Basis Based on Risk Rating Category (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Credit Quality Information [Abstract] |  |
Current fiscal year | $ 1,272,141 | $ 1,200,288
Fiscal year before current fiscal year | 1,002,106 | 818,943
Two years before current fiscal year | 703,378 | 547,593
Three years before current fiscal year | 417,566 | 374,575
Four years before current fiscal year | 364,105 | 247,554
Prior | 914,110 | 763,077
Revolving Loans | 46,884 | 43,493
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 4,720,290 | 3,995,523
Pass |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 1,261,386 | 1,177,678
Fiscal year before current fiscal year | 998,362 | 815,269
Two years before current fiscal year | 699,645 | 527,037
Three years before current fiscal year | 411,895 | 367,606
Four years before current fiscal year | 352,156 | 225,557
Prior | 881,466 | 726,479
Revolving Loans | 46,485 | 42,800
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 4,651,395 | 3,882,426
Special Mention |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 5,468 | 18,807
Fiscal year before current fiscal year | 2,210 | 2,354
Two years before current fiscal year | 1,922 | 11,947
Three years before current fiscal year | 3,843 | 2,519
Four years before current fiscal year | 1,812 | 13,769
Prior | 13,600 | 16,798
Revolving Loans | 129 | 41
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 28,984 | 66,235
Substandard |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 5,287 | 3,803
Fiscal year before current fiscal year | 1,534 | 1,320
Two years before current fiscal year | 1,811 | 8,609
Three years before current fiscal year | 1,359 | 4,450
Four years before current fiscal year | 10,137 | 8,228
Prior | 19,044 | 19,800
Revolving Loans | 270 | 652
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 39,442 | 46,862
Doubtful |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 0 |
Fiscal year before current fiscal year | 0 |
Two years before current fiscal year | 0 |
Three years before current fiscal year | 469 |
Four years before current fiscal year | 0 |
Prior | 0 |
Revolving Loans | 0 |
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 469 |
Agricultural Loans |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 115,210 | 119,453
Fiscal year before current fiscal year | 27,703 | 18,357
Two years before current fiscal year | 10,197 | 8,260
Three years before current fiscal year | 3,697 | 2,972
Four years before current fiscal year | 1,745 | 937
Prior | 1,959 | 1,505
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 160,511 | 151,484
Agricultural Loans | Pass |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 112,261 | 105,378
Fiscal year before current fiscal year | 27,677 | 17,903
Two years before current fiscal year | 10,197 | 5,612
Three years before current fiscal year | 3,585 | 2,822
Four years before current fiscal year | 1,663 | 924
Prior | 1,850 | 1,316
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 157,233 | 133,955
Agricultural Loans | Special Mention |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 2,099 | 13,725
Fiscal year before current fiscal year | 26 | 436
Two years before current fiscal year | 0 | 2,648
Three years before current fiscal year | 62 | 150
Four years before current fiscal year | 78 | 13
Prior | 109 | 64
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 2,374 | 17,036
Agricultural Loans | Substandard |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 850 | 350
Fiscal year before current fiscal year | 0 | 18
Two years before current fiscal year | 0 | 0
Three years before current fiscal year | 50 | 0
Four years before current fiscal year | 4 | 0
Prior | 0 | 125
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 904 | 493
Commercial Industrial And Other Portfolio Segment |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 404,140 | 280,933
Fiscal year before current fiscal year | 221,190 | 168,095
Two years before current fiscal year | 184,003 | 121,298
Three years before current fiscal year | 69,761 | 76,825
Four years before current fiscal year | 70,524 | 23,389
Prior | 274,869 | 305,214
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 1,224,487 | 975,754
Commercial Industrial And Other Portfolio Segment | Pass |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 403,584 | 279,814
Fiscal year before current fiscal year | 220,179 | 167,662
Two years before current fiscal year | 183,378 | 119,702
Three years before current fiscal year | 68,370 | 76,022
Four years before current fiscal year | 70,106 | 22,888
Prior | 273,643 | 302,962
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 1,219,260 | 969,050
Commercial Industrial And Other Portfolio Segment | Special Mention |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 191 | 613
Fiscal year before current fiscal year | 460 | 399
Two years before current fiscal year | 343 | 1,463
Three years before current fiscal year | 885 | 182
Four years before current fiscal year | 242 | 477
Prior | 568 | 819
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 2,689 | 3,953
Commercial Industrial And Other Portfolio Segment | Substandard |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 365 | 506
Fiscal year before current fiscal year | 551 | 34
Two years before current fiscal year | 282 | 133
Three years before current fiscal year | 37 | 621
Four years before current fiscal year | 176 | 24
Prior | 658 | 1,433
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 2,069 | 2,751
Commercial Industrial And Other Portfolio Segment | Doubtful |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 0 |
Fiscal year before current fiscal year | 0 |
Two years before current fiscal year | 0 |
Three years before current fiscal year | 469 |
Four years before current fiscal year | 0 |
Prior | 0 |
Revolving Loans | 0 |
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 469 |
Consumer Loans |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 42,974 | 28,601
Fiscal year before current fiscal year | 23,794 | 19,145
Two years before current fiscal year | 18,070 | 17,324
Three years before current fiscal year | 9,495 | 6,192
Four years before current fiscal year | 2,690 | 4,340
Prior | 3,760 | 2,840
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 100,783 | 78,442
Consumer Loans | Pass |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 42,963 | 27,948
Fiscal year before current fiscal year | 23,540 | 19,033
Two years before current fiscal year | 17,896 | 16,978
Three years before current fiscal year | 9,442 | 5,505
Four years before current fiscal year | 2,630 | 4,297
Prior | 3,738 | 1,244
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 100,209 | 75,005
Consumer Loans | Special Mention |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 0 | 68
Fiscal year before current fiscal year | 52 | 54
Two years before current fiscal year | 30 | 38
Three years before current fiscal year | 29 | 9
Four years before current fiscal year | 6 | 0
Prior | 0 | 0
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 117 | 169
Consumer Loans | Substandard |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 11 | 585
Fiscal year before current fiscal year | 202 | 58
Two years before current fiscal year | 144 | 308
Three years before current fiscal year | 24 | 678
Four years before current fiscal year | 54 | 43
Prior | 22 | 1,596
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 457 | 3,268
Real Estate Loan |  |
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 3,234,509 | 2,789,843
Real Estate Loan | Construction and Land Development |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 44,523 | 38,766
Fiscal year before current fiscal year | 41,588 | 34,774
Two years before current fiscal year | 20,108 | 23,505
Three years before current fiscal year | 22,684 | 34,841
Four years before current fiscal year | 2,042 | 3,760
Prior | 11,856 | 9,472
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 142,801 | 145,118
Real Estate Loan | Construction and Land Development | Pass |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 44,523 | 38,656
Fiscal year before current fiscal year | 41,588 | 34,774
Two years before current fiscal year | 20,108 | 23,505
Three years before current fiscal year | 22,670 | 34,358
Four years before current fiscal year | 2,042 | 3,760
Prior | 11,388 | 9,433
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 142,319 | 144,486
Real Estate Loan | Construction and Land Development | Special Mention |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 0 | 110
Fiscal year before current fiscal year | 0 | 0
Two years before current fiscal year | 0 | 0
Three years before current fiscal year | 0 | 0
Four years before current fiscal year | 0 | 0
Prior | 0 | 0
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 0 | 110
Real Estate Loan | Construction and Land Development | Substandard |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 0
Two years before current fiscal year | 0 | 0
Three years before current fiscal year | 14 | 483
Four years before current fiscal year | 0 | 0
Prior | 468 | 39
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 482 | 522
Real Estate Loan | Agricultural |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 121,553 | 79,665
Fiscal year before current fiscal year | 66,652 | 64,418
Two years before current fiscal year | 58,921 | 30,133
Three years before current fiscal year | 25,343 | 30,774
Four years before current fiscal year | 29,687 | 12,268
Prior | 58,268 | 62,014
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 360,424 | 279,272
Real Estate Loan | Agricultural | Pass |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 120,430 | 78,793
Fiscal year before current fiscal year | 66,652 | 64,159
Two years before current fiscal year | 58,431 | 25,713
Three years before current fiscal year | 24,048 | 30,203
Four years before current fiscal year | 27,955 | 12,142
Prior | 53,902 | 54,808
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 351,418 | 265,818
Real Estate Loan | Agricultural | Special Mention |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 1,123 | 872
Fiscal year before current fiscal year | 0 | 259
Two years before current fiscal year | 490 | 4,028
Three years before current fiscal year | 1,295 | 384
Four years before current fiscal year | 273 | 69
Prior | 3,195 | 6,087
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 6,376 | 11,699
Real Estate Loan | Agricultural | Substandard |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 0 | 0
Fiscal year before current fiscal year | 0 | 0
Two years before current fiscal year | 0 | 392
Three years before current fiscal year | 0 | 187
Four years before current fiscal year | 1,459 | 57
Prior | 1,171 | 1,119
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 2,630 | 1,755
Real Estate Loan | Commercial And Multifamily Portfolio Segment |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 465,988 | 573,392
Fiscal year before current fiscal year | 531,614 | 419,254
Two years before current fiscal year | 328,979 | 308,051
Three years before current fiscal year | 257,905 | 176,922
Four years before current fiscal year | 222,522 | 166,066
Prior | 487,651 | 321,455
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 2,294,659 | 1,965,140
Real Estate Loan | Commercial And Multifamily Portfolio Segment | Pass |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 460,123 | 568,200
Fiscal year before current fiscal year | 529,691 | 417,334
Two years before current fiscal year | 327,112 | 299,973
Three years before current fiscal year | 255,439 | 174,448
Four years before current fiscal year | 215,989 | 150,811
Prior | 470,189 | 304,585
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 2,258,543 | 1,915,351
Real Estate Loan | Commercial And Multifamily Portfolio Segment | Special Mention |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 2,055 | 3,185
Fiscal year before current fiscal year | 1,439 | 1,206
Two years before current fiscal year | 1,057 | 1,836
Three years before current fiscal year | 1,533 | 1,295
Four years before current fiscal year | 970 | 10,609
Prior | 8,604 | 8,632
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 15,658 | 26,763
Real Estate Loan | Commercial And Multifamily Portfolio Segment | Substandard |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 3,810 | 2,007
Fiscal year before current fiscal year | 484 | 714
Two years before current fiscal year | 810 | 6,242
Three years before current fiscal year | 933 | 1,179
Four years before current fiscal year | 5,563 | 4,646
Prior | 8,858 | 8,238
Revolving Loans | 0 | 0
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 20,458 | 23,026
1-4 Family | Real Estate Loan |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 77,753 | 79,478
Fiscal year before current fiscal year | 89,565 | 94,900
Two years before current fiscal year | 83,100 | 39,022
Three years before current fiscal year | 28,681 | 46,049
Four years before current fiscal year | 34,895 | 36,794
Prior | 75,747 | 60,577
Revolving Loans | 46,884 | 43,493
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 436,625 | 400,313
1-4 Family | Real Estate Loan | Pass |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 77,502 | 78,889
Fiscal year before current fiscal year | 89,035 | 94,404
Two years before current fiscal year | 82,523 | 35,554
Three years before current fiscal year | 28,341 | 44,248
Four years before current fiscal year | 31,771 | 30,735
Prior | 66,756 | 52,131
Revolving Loans | 46,485 | 42,800
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 422,413 | 378,761
1-4 Family | Real Estate Loan | Special Mention |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 0 | 234
Fiscal year before current fiscal year | 233 | 0
Two years before current fiscal year | 2 | 1,934
Three years before current fiscal year | 39 | 499
Four years before current fiscal year | 243 | 2,601
Prior | 1,124 | 1,196
Revolving Loans | 129 | 41
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | 1,770 | 6,505
1-4 Family | Real Estate Loan | Substandard |  |
Credit Quality Information [Abstract] |  |
Current fiscal year | 251 | 355
Fiscal year before current fiscal year | 297 | 496
Two years before current fiscal year | 575 | 1,534
Three years before current fiscal year | 301 | 1,302
Four years before current fiscal year | 2,881 | 3,458
Prior | 7,867 | 7,250
Revolving Loans | 270 | 652
Loans Receivable Aging Analysis [Abstract] |  |
Total Loans Receivable | $ 12,442 | $ 15,047

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