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Loans Held for Investment and Allowance for Credit Losses on Loans - Gross Loans Held for Investment by Year of Origination and Internally Assigned Credit Grades (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | $ 2,201,950 | $ 2,264,479
Fiscal year before current fiscal year | 1,564,202 | 1,428,113
Two years before current fiscal year | 1,100,602 | 752,483
Three years before current fiscal year | 560,696 | 541,762
Four years before current fiscal year | 416,738 | 242,342
Prior | 634,924 | 589,317
Revolving Loans Amortized Cost Basis | 1,177,533 | 1,125,067
Total Loans | 7,656,645 | 6,943,563
Agriculture [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total Loans | 427,139 | 408,037
Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total Loans | 7,656,645 | 6,943,563
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 165,315 | 208,645
Fiscal year before current fiscal year | 209,978 | 181,695
Two years before current fiscal year | 156,881 | 133,825
Three years before current fiscal year | 109,088 | 112,335
Four years before current fiscal year | 99,444 | 53,126
Prior | 161,330 | 151,043
Revolving Loans Amortized Cost Basis | 58,908 | 67,825
Total Loans | 960,944 | 908,494
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 125,041 | 173,596
Fiscal year before current fiscal year | 144,429 | 145,425
Two years before current fiscal year | 124,113 | 106,285
Three years before current fiscal year | 85,619 | 91,892
Four years before current fiscal year | 77,400 | 44,086
Prior | 135,064 | 119,755
Revolving Loans Amortized Cost Basis | 23,004 | 53,026
Total Loans | 714,670 | 734,065
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 39,735 | 34,774
Fiscal year before current fiscal year | 61,879 | 34,283
Two years before current fiscal year | 28,506 | 27,153
Three years before current fiscal year | 22,473 | 17,999
Four years before current fiscal year | 19,617 | 8,528
Prior | 24,199 | 29,638
Revolving Loans Amortized Cost Basis | 33,304 | 14,737
Total Loans | 229,713 | 167,112
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 140 | 235
Fiscal year before current fiscal year | 3,580 | 1,718
Two years before current fiscal year | 4,262 | 387
Three years before current fiscal year | 644 | 1,334
Four years before current fiscal year | 1,432 | 332
Prior | 1,051 | 1,161
Revolving Loans Amortized Cost Basis | 2,450 | 62
Total Loans | 13,559 | 5,229
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 399 | 40
Fiscal year before current fiscal year | 90 | 269
Three years before current fiscal year | 352 | 1,110
Four years before current fiscal year | 656 | 180
Prior | 1,016 | 489
Revolving Loans Amortized Cost Basis | 150 |
Total Loans | 2,663 | 2,088
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 5 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Four years before current fiscal year | 339 |
Total Loans | 339 |
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 305,555 | 472,382
Fiscal year before current fiscal year | 418,917 | 289,942
Two years before current fiscal year | 253,559 | 199,370
Three years before current fiscal year | 166,830 | 157,586
Four years before current fiscal year | 126,369 | 49,058
Prior | 141,468 | 137,512
Revolving Loans Amortized Cost Basis | 73,722 | 77,300
Total Loans | 1,486,420 | 1,383,150
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 221,014 | 349,333
Fiscal year before current fiscal year | 271,637 | 239,369
Two years before current fiscal year | 172,291 | 170,186
Three years before current fiscal year | 113,676 | 107,983
Four years before current fiscal year | 56,831 | 24,075
Prior | 68,576 | 66,546
Revolving Loans Amortized Cost Basis | 44,878 | 45,372
Total Loans | 948,903 | 1,002,864
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 82,206 | 115,372
Fiscal year before current fiscal year | 139,982 | 50,573
Two years before current fiscal year | 79,204 | 29,031
Three years before current fiscal year | 53,154 | 46,870
Four years before current fiscal year | 63,331 | 24,877
Prior | 72,075 | 69,601
Revolving Loans Amortized Cost Basis | 28,844 | 31,928
Total Loans | 518,796 | 368,252
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 2,135 | 7,677
Fiscal year before current fiscal year | 6,666 |
Two years before current fiscal year | 1,715 | 153
Three years before current fiscal year |  | 2,733
Four years before current fiscal year | 6,207 | 64
Prior | 251 | 1,318
Total Loans | 16,974 | 11,945
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 200 |
Fiscal year before current fiscal year | 632 |
Two years before current fiscal year | 349 |
Four years before current fiscal year |  | 42
Prior | 566 | 47
Total Loans | 1,747 | 89
Real Estate [Member] | Construction and Development Less than 60 Months [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 221,407 | 201,922
Fiscal year before current fiscal year | 178,831 | 112,868
Two years before current fiscal year | 94,345 | 41,406
Three years before current fiscal year | 12,688 | 19,853
Four years before current fiscal year | 16,798 | 4,794
Prior | 7,184 | 5,788
Revolving Loans Amortized Cost Basis | 111,390 | 88,605
Total Loans | 642,643 | 475,236
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 124,218 | 164,865
Fiscal year before current fiscal year | 133,254 | 92,595
Two years before current fiscal year | 65,472 | 39,819
Three years before current fiscal year | 5,828 | 5,558
Four years before current fiscal year | 3,392 | 3,146
Prior | 5,019 | 4,993
Revolving Loans Amortized Cost Basis | 76,831 | 40,474
Total Loans | 414,014 | 351,450
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 95,138 | 36,090
Fiscal year before current fiscal year | 43,884 | 20,273
Two years before current fiscal year | 28,772 | 1,413
Three years before current fiscal year | 6,625 | 14,248
Four years before current fiscal year | 13,406 | 1,648
Prior | 2,146 | 774
Revolving Loans Amortized Cost Basis | 34,559 | 47,973
Total Loans | 224,530 | 122,419
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 2,051 | 967
Fiscal year before current fiscal year | 893 |
Two years before current fiscal year | 101 | 141
Three years before current fiscal year | 235 |
Prior | 19 | 8
Revolving Loans Amortized Cost Basis |  | 158
Total Loans | 3,299 | 1,274
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Fiscal year before current fiscal year | 800 |
Two years before current fiscal year |  | 33
Three years before current fiscal year |  | 47
Prior |  | 13
Total Loans | 800 | 93
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 221,463 | 250,505
Fiscal year before current fiscal year | 10,509 | 13,774
Two years before current fiscal year | 1,448 | 361
Three years before current fiscal year | 112 | 18
Four years before current fiscal year | 105 |
Prior | 467 | 442
Revolving Loans Amortized Cost Basis | 49,382 | 38,205
Total Loans | 283,486 | 303,305
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 158,161 | 209,699
Fiscal year before current fiscal year | 7,551 | 12,612
Two years before current fiscal year | 1,421 | 259
Three years before current fiscal year | 100 | 18
Four years before current fiscal year | 105 |
Prior | 467 | 42
Revolving Loans Amortized Cost Basis | 49,284 | 36,114
Total Loans | 217,089 | 258,744
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 57,172 | 39,174
Fiscal year before current fiscal year | 2,365 | 1,152
Two years before current fiscal year | 27 | 102
Three years before current fiscal year | 12 |
Prior |  | 400
Revolving Loans Amortized Cost Basis | 98 | 2,091
Total Loans | 59,674 | 42,919
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 5,457 | 1,212
Fiscal year before current fiscal year | 387 |
Total Loans | 5,844 | 1,212
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 673 | 420
Fiscal year before current fiscal year | 206 | 10
Total Loans | 879 | 430
Real Estate [Member] | Residential Real Estate First Lien [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 348,916 | 352,115
Fiscal year before current fiscal year | 268,012 | 244,044
Two years before current fiscal year | 213,325 | 168,615
Three years before current fiscal year | 141,217 | 101,339
Four years before current fiscal year | 86,027 | 67,959
Prior | 195,200 | 179,585
Revolving Loans Amortized Cost Basis | 6,047 | 4,242
Total Loans | 1,258,744 | 1,117,899
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 294,363 | 303,369
Fiscal year before current fiscal year | 226,557 | 205,377
Two years before current fiscal year | 174,325 | 141,752
Three years before current fiscal year | 115,055 | 85,850
Four years before current fiscal year | 71,941 | 55,631
Prior | 149,836 | 136,776
Revolving Loans Amortized Cost Basis | 6,047 | 4,242
Total Loans | 1,038,124 | 932,997
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 51,619 | 46,751
Fiscal year before current fiscal year | 39,146 | 36,453
Two years before current fiscal year | 35,226 | 25,623
Three years before current fiscal year | 24,738 | 13,414
Four years before current fiscal year | 12,591 | 11,687
Prior | 39,264 | 37,167
Total Loans | 202,584 | 171,095
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 2,175 | 1,940
Fiscal year before current fiscal year | 2,187 | 1,903
Two years before current fiscal year | 2,630 | 1,065
Three years before current fiscal year | 773 | 1,689
Four years before current fiscal year | 1,140 | 497
Prior | 4,009 | 3,826
Total Loans | 12,914 | 10,920
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 759 | 55
Fiscal year before current fiscal year | 122 | 311
Two years before current fiscal year | 1,144 | 175
Three years before current fiscal year | 651 | 386
Four years before current fiscal year | 355 | 144
Prior | 2,091 | 1,816
Total Loans | 5,122 | 2,887
Real Estate [Member] | Residential Real Estate All Other [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 49,193 | 37,805
Fiscal year before current fiscal year | 30,966 | 13,103
Two years before current fiscal year | 9,994 | 12,539
Three years before current fiscal year | 9,814 | 7,129
Four years before current fiscal year | 5,139 | 5,084
Prior | 15,834 | 14,611
Revolving Loans Amortized Cost Basis | 123,756 | 105,927
Total Loans | 244,696 | 196,198
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 44,475 | 31,741
Fiscal year before current fiscal year | 24,861 | 11,012
Two years before current fiscal year | 8,381 | 10,696
Three years before current fiscal year | 8,122 | 5,458
Four years before current fiscal year | 3,753 | 3,607
Prior | 12,827 | 11,198
Revolving Loans Amortized Cost Basis | 46,479 | 41,653
Total Loans | 148,898 | 115,365
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 4,244 | 5,683
Fiscal year before current fiscal year | 5,819 | 1,887
Two years before current fiscal year | 1,415 | 1,744
Three years before current fiscal year | 1,652 | 1,589
Four years before current fiscal year | 1,308 | 1,237
Prior | 2,527 | 2,574
Revolving Loans Amortized Cost Basis | 74,388 | 62,395
Total Loans | 91,353 | 77,109
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 355 | 381
Fiscal year before current fiscal year | 262 | 186
Two years before current fiscal year | 198 | 71
Three years before current fiscal year | 40 | 50
Four years before current fiscal year | 23 | 201
Prior | 391 | 786
Revolving Loans Amortized Cost Basis | 1,942 | 1,828
Total Loans | 3,211 | 3,503
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 119 |
Fiscal year before current fiscal year | 24 | 18
Two years before current fiscal year |  | 28
Three years before current fiscal year |  | 32
Four years before current fiscal year | 55 | 39
Prior | 89 | 53
Revolving Loans Amortized Cost Basis | 947 | 51
Total Loans | 1,234 | 221
Real Estate [Member] | Agriculture [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 91,544 | 109,168
Fiscal year before current fiscal year | 73,848 | 67,507
Two years before current fiscal year | 53,929 | 49,247
Three years before current fiscal year | 39,130 | 32,862
Four years before current fiscal year | 26,736 | 18,553
Prior | 51,498 | 49,846
Revolving Loans Amortized Cost Basis | 90,454 | 80,854
Total Loans | 427,139 | 408,037
Real Estate [Member] | Agriculture [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 52,934 | 73,722
Fiscal year before current fiscal year | 51,099 | 44,037
Two years before current fiscal year | 34,840 | 35,684
Three years before current fiscal year | 26,603 | 22,094
Four years before current fiscal year | 17,863 | 12,064
Prior | 33,052 | 31,517
Revolving Loans Amortized Cost Basis | 46,981 | 42,542
Total Loans | 263,372 | 261,660
Real Estate [Member] | Agriculture [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 28,829 | 28,351
Fiscal year before current fiscal year | 20,931 | 22,773
Two years before current fiscal year | 18,245 | 9,638
Three years before current fiscal year | 9,826 | 10,548
Four years before current fiscal year | 8,207 | 6,025
Prior | 15,833 | 15,233
Revolving Loans Amortized Cost Basis | 41,018 | 33,844
Total Loans | 142,889 | 126,412
Real Estate [Member] | Agriculture [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 9,516 | 6,435
Fiscal year before current fiscal year | 1,185 | 476
Two years before current fiscal year | 789 | 3,427
Three years before current fiscal year | 2,570 | 140
Four years before current fiscal year | 296 | 320
Prior | 2,372 | 2,703
Revolving Loans Amortized Cost Basis | 2,454 | 4,452
Total Loans | 19,182 | 17,953
Real Estate [Member] | Agriculture [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 265 | 660
Fiscal year before current fiscal year | 633 | 221
Two years before current fiscal year | 55 | 498
Three years before current fiscal year | 131 | 80
Four years before current fiscal year | 370 | 144
Prior | 241 | 393
Revolving Loans Amortized Cost Basis | 1 | 16
Total Loans | 1,696 | 2,012
Commercial Non-real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 351,089 | 372,602
Fiscal year before current fiscal year | 216,257 | 252,996
Two years before current fiscal year | 180,400 | 85,651
Three years before current fiscal year | 46,483 | 63,919
Four years before current fiscal year | 44,266 | 31,322
Prior | 42,213 | 45,680
Revolving Loans Amortized Cost Basis | 408,744 | 389,284
Total Loans | 1,289,452 | 1,241,454
Commercial Non-real Estate [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 252,112 | 282,252
Fiscal year before current fiscal year | 176,013 | 205,516
Two years before current fiscal year | 159,470 | 67,229
Three years before current fiscal year | 39,097 | 50,725
Four years before current fiscal year | 36,907 | 13,780
Prior | 33,824 | 40,989
Revolving Loans Amortized Cost Basis | 277,740 | 280,774
Total Loans | 975,163 | 941,265
Commercial Non-real Estate [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 95,590 | 88,017
Fiscal year before current fiscal year | 35,955 | 46,604
Two years before current fiscal year | 19,519 | 17,420
Three years before current fiscal year | 6,591 | 11,447
Four years before current fiscal year | 6,456 | 15,628
Prior | 8,071 | 3,582
Revolving Loans Amortized Cost Basis | 127,800 | 105,783
Total Loans | 299,982 | 288,481
Commercial Non-real Estate [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 2,206 | 2,093
Fiscal year before current fiscal year | 2,598 | 461
Two years before current fiscal year | 1,011 | 346
Three years before current fiscal year | 109 | 738
Four years before current fiscal year | 121 | 1,566
Prior | 164 | 180
Revolving Loans Amortized Cost Basis | 1,779 | 2,544
Total Loans | 7,988 | 7,928
Commercial Non-real Estate [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 1,181 | 240
Fiscal year before current fiscal year | 1,691 | 415
Two years before current fiscal year | 400 | 656
Three years before current fiscal year | 686 | 745
Four years before current fiscal year | 309 | 348
Prior | 154 | 929
Revolving Loans Amortized Cost Basis | 1,425 | 183
Total Loans | 5,846 | 3,516
Commercial Non-real Estate [Member] | Grade 5 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Three years before current fiscal year |  | 264
Four years before current fiscal year | 473 |
Total Loans | 473 | 264
Consumer Non-real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 231,415 | 225,305
Fiscal year before current fiscal year | 122,160 | 115,940
Two years before current fiscal year | 63,184 | 44,216
Three years before current fiscal year | 21,034 | 22,999
Four years before current fiscal year | 10,012 | 7,601
Prior | 4,377 | 3,603
Revolving Loans Amortized Cost Basis | 24,285 | 27,092
Total Loans | 476,467 | 446,756
Consumer Non-real Estate [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 211,028 | 203,238
Fiscal year before current fiscal year | 105,365 | 104,380
Two years before current fiscal year | 55,079 | 39,779
Three years before current fiscal year | 18,529 | 21,035
Four years before current fiscal year | 8,939 | 6,589
Prior | 3,301 | 2,187
Revolving Loans Amortized Cost Basis | 22,184 | 26,263
Total Loans | 424,425 | 403,471
Consumer Non-real Estate [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 19,085 | 21,011
Fiscal year before current fiscal year | 14,919 | 10,538
Two years before current fiscal year | 6,764 | 3,978
Three years before current fiscal year | 2,062 | 1,541
Four years before current fiscal year | 702 | 822
Prior | 910 | 1,340
Revolving Loans Amortized Cost Basis | 2,085 | 825
Total Loans | 46,527 | 40,055
Consumer Non-real Estate [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 941 | 827
Fiscal year before current fiscal year | 1,424 | 671
Two years before current fiscal year | 932 | 405
Three years before current fiscal year | 326 | 282
Four years before current fiscal year | 299 | 134
Prior | 156 | 63
Revolving Loans Amortized Cost Basis | 11 | 4
Total Loans | 4,089 | 2,386
Consumer Non-real Estate [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 361 | 229
Fiscal year before current fiscal year | 452 | 351
Two years before current fiscal year | 409 | 54
Three years before current fiscal year | 117 | 141
Four years before current fiscal year | 72 | 56
Prior | 10 | 13
Revolving Loans Amortized Cost Basis | 5 |
Total Loans | 1,426 | 844
Oil and Gas [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 216,053 | 34,030
Fiscal year before current fiscal year | 34,724 | 136,244
Two years before current fiscal year | 73,537 | 17,253
Three years before current fiscal year | 14,300 | 23,722
Four years before current fiscal year | 1,842 | 4,845
Prior | 15,353 | 1,207
Revolving Loans Amortized Cost Basis | 230,845 | 245,733
Total Loans | 586,654 | 463,034
Oil and Gas [Member] | Grade 1 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 147,902 | 24,303
Fiscal year before current fiscal year | 29,658 | 125,209
Two years before current fiscal year | 72,127 | 16,482
Three years before current fiscal year | 13,898 | 682
Four years before current fiscal year | 1,553 | 1,678
Prior | 15,015 | 880
Revolving Loans Amortized Cost Basis | 180,321 | 199,995
Total Loans | 460,474 | 369,229
Oil and Gas [Member] | Grade 2 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 66,080 | 7,610
Fiscal year before current fiscal year | 4,851 | 10,668
Two years before current fiscal year | 1,019 | 766
Three years before current fiscal year | 402 | 23,040
Four years before current fiscal year | 279 | 3,167
Prior | 177 | 327
Revolving Loans Amortized Cost Basis | 50,201 | 45,240
Total Loans | 123,009 | 90,818
Oil and Gas [Member] | Grade 3 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 1,758 | 2,117
Fiscal year before current fiscal year | 132 | 47
Two years before current fiscal year | 225 | 5
Revolving Loans Amortized Cost Basis | 323 | 498
Total Loans | 2,438 | 2,667
Oil and Gas [Member] | Grade 4 [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Current fiscal year | 313 |
Fiscal year before current fiscal year | 83 | 320
Two years before current fiscal year | 166 |
Four years before current fiscal year | 10 |
Prior | 161 |
Total Loans | $ 733 | $ 320

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- Definition Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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