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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
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