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Allowance for Credit Losses, Credit Quality and Other - Summary of Amortized Cost of Performing and Nonperforming Loans (Detail) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | $ 1,085,614 | $ 2,138,730
Year Two | 2,217,758 | 3,341,500
Year Three | 3,235,526 | 2,083,044
Year Four | 1,874,191 | 1,132,926
Year Five | 973,604 | 872,429
Prior | 3,416,284 | 2,908,528
Revolving Loans Amortized Cost Basis | 1,978,480 | 1,947,571
Total | 14,781,457 | 14,424,728
Commercial real estate loans |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 598,496 | 930,022
Year Two | 1,100,853 | 2,146,390
Year Three | 2,013,543 | 1,262,133
Year Four | 1,167,143 | 626,807
Year Five | 506,053 | 481,164
Prior | 2,184,344 | 1,905,250
Revolving Loans Amortized Cost Basis | 886,771 | 816,391
Total | 8,457,203 | 8,168,157
Commercial real estate loans | Non-farm/non-residential |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 246,380 | 388,831
Year Two | 496,032 | 1,150,598
Year Three | 1,001,891 | 830,588
Year Four | 849,486 | 491,298
Year Five | 407,839 | 404,822
Prior | 2,002,645 | 1,747,135
Revolving Loans Amortized Cost Basis | 595,652 | 536,682
Total | 5,599,925 | 5,549,954
Commercial real estate loans | Non-farm/non-residential | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 246,380 | 388,831
Year Two | 496,032 | 1,150,598
Year Three | 1,001,833 | 821,373
Year Four | 848,885 | 490,153
Year Five | 406,448 | 404,061
Prior | 1,959,115 | 1,718,776
Revolving Loans Amortized Cost Basis | 595,572 | 536,349
Total | 5,554,265 | 5,510,141
Commercial real estate loans | Non-farm/non-residential | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 0
Year Two | 0 | 0
Year Three | 58 | 9,215
Year Four | 601 | 1,145
Year Five | 1,391 | 761
Prior | 43,530 | 28,359
Revolving Loans Amortized Cost Basis | 80 | 333
Total | 45,660 | 39,813
Commercial real estate loans | Construction/land development |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 315,464 | 501,215
Year Two | 559,633 | 926,208
Year Three | 945,683 | 384,657
Year Four | 276,770 | 88,901
Year Five | 60,426 | 55,857
Prior | 93,863 | 81,216
Revolving Loans Amortized Cost Basis | 259,978 | 254,993
Total | 2,511,817 | 2,293,047
Commercial real estate loans | Construction/land development | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 315,464 | 501,215
Year Two | 559,633 | 918,390
Year Three | 943,476 | 382,954
Year Four | 275,358 | 88,204
Year Five | 59,649 | 55,239
Prior | 93,082 | 81,028
Revolving Loans Amortized Cost Basis | 259,036 | 253,667
Total | 2,505,698 | 2,280,697
Commercial real estate loans | Construction/land development | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 0
Year Two | 0 | 7,818
Year Three | 2,207 | 1,703
Year Four | 1,412 | 697
Year Five | 777 | 618
Prior | 781 | 188
Revolving Loans Amortized Cost Basis | 942 | 1,326
Total | 6,119 | 12,350
Commercial real estate loans | Agricultural |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 36,652 | 39,976
Year Two | 45,188 | 69,584
Year Three | 65,969 | 46,888
Year Four | 40,887 | 46,608
Year Five | 37,788 | 20,485
Prior | 87,836 | 76,899
Revolving Loans Amortized Cost Basis | 31,141 | 24,716
Total | 345,461 | 325,156
Commercial real estate loans | Agricultural | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 36,652 | 39,976
Year Two | 45,188 | 69,584
Year Three | 65,969 | 46,809
Year Four | 40,821 | 46,608
Year Five | 37,788 | 20,485
Prior | 87,290 | 76,547
Revolving Loans Amortized Cost Basis | 31,141 | 24,716
Total | 344,849 | 324,725
Commercial real estate loans | Agricultural | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 0
Year Two | 0 | 0
Year Three | 0 | 79
Year Four | 66 | 0
Year Five | 0 | 0
Prior | 546 | 352
Revolving Loans Amortized Cost Basis | 0 | 0
Total | 612 | 431
Residential real estate loans | Residential 1-4 family |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 127,293 | 261,784
Year Two | 245,489 | 409,197
Year Three | 430,665 | 300,563
Year Four | 268,374 | 171,122
Year Five | 162,118 | 111,327
Prior | 471,659 | 403,729
Revolving Loans Amortized Cost Basis | 204,545 | 186,538
Total | 1,910,143 | 1,844,260
Residential real estate loans | Residential 1-4 family | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 127,293 | 261,784
Year Two | 244,414 | 405,239
Year Three | 426,495 | 298,207
Year Four | 264,868 | 167,475
Year Five | 158,533 | 108,091
Prior | 459,240 | 396,130
Revolving Loans Amortized Cost Basis | 204,151 | 185,948
Total | 1,884,994 | 1,822,874
Residential real estate loans | Residential 1-4 family | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 0
Year Two | 1,075 | 3,958
Year Three | 4,170 | 2,356
Year Four | 3,506 | 3,647
Year Five | 3,585 | 3,236
Prior | 12,419 | 7,599
Revolving Loans Amortized Cost Basis | 394 | 590
Total | 25,149 | 21,386
Residential real estate loans | Multifamily residential |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 56,867 | 3,983
Year Two | 3,982 | 87,012
Year Three | 147,697 | 107,301
Year Four | 75,240 | 108,702
Year Five | 101,535 | 39,815
Prior | 101,928 | 74,564
Revolving Loans Amortized Cost Basis | 21,842 | 14,359
Total | 509,091 | 435,736
Residential real estate loans | Multifamily residential | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 56,867 | 3,983
Year Two | 3,982 | 87,012
Year Three | 147,697 | 107,301
Year Four | 75,240 | 108,702
Year Five | 101,535 | 39,815
Prior | 101,928 | 74,564
Revolving Loans Amortized Cost Basis | 21,842 | 14,359
Total | 509,091 | 435,736
Residential real estate loans | Multifamily residential | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
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
Total real estate |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 782,656 | 1,195,789
Year Two | 1,350,324 | 2,642,599
Year Three | 2,591,905 | 1,669,997
Year Four | 1,510,757 | 906,631
Year Five | 769,706 | 632,306
Prior | 2,757,931 | 2,383,543
Revolving Loans Amortized Cost Basis | 1,113,158 | 1,017,288
Total | 10,876,437 | 10,448,153
Consumer |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 140,612 | 255,930
Year Two | 232,030 | 257,588
Year Three | 239,748 | 216,645
Year Four | 194,632 | 109,981
Year Five | 98,793 | 110,406
Prior | 280,765 | 200,071
Revolving Loans Amortized Cost Basis | 2,806 | 3,069
Total | 1,189,386 | 1,153,690
Consumer | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 140,604 | 255,771
Year Two | 231,803 | 256,826
Year Three | 239,118 | 215,831
Year Four | 194,331 | 109,442
Year Five | 98,132 | 110,267
Prior | 278,684 | 198,982
Revolving Loans Amortized Cost Basis | 2,786 | 3,060
Total | 1,185,458 | 1,150,179
Consumer | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 8 | 159
Year Two | 227 | 762
Year Three | 630 | 814
Year Four | 301 | 539
Year Five | 661 | 139
Prior | 2,081 | 1,089
Revolving Loans Amortized Cost Basis | 20 | 9
Total | 3,928 | 3,511
Commercial and industrial |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 113,216 | 619,371
Year Two | 576,452 | 385,376
Year Three | 353,826 | 156,919
Year Four | 133,211 | 88,094
Year Five | 79,251 | 114,522
Prior | 321,820 | 276,677
Revolving Loans Amortized Cost Basis | 664,296 | 684,032
Total | 2,242,072 | 2,324,991
Commercial and industrial | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 113,216 | 616,809
Year Two | 573,528 | 382,190
Year Three | 350,689 | 156,056
Year Four | 132,118 | 87,531
Year Five | 78,770 | 111,529
Prior | 316,636 | 273,434
Revolving Loans Amortized Cost Basis | 663,146 | 680,552
Total | 2,228,103 | 2,308,101
Commercial and industrial | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 2,562
Year Two | 2,924 | 3,186
Year Three | 3,137 | 863
Year Four | 1,093 | 563
Year Five | 481 | 2,993
Prior | 5,184 | 3,243
Revolving Loans Amortized Cost Basis | 1,150 | 3,480
Total | 13,969 | 16,890
Agricultural & other |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 49,130 | 67,640
Year Two | 58,952 | 55,937
Year Three | 50,047 | 39,483
Year Four | 35,591 | 28,220
Year Five | 25,854 | 15,195
Prior | 55,768 | 48,237
Revolving Loans Amortized Cost Basis | 198,220 | 243,182
Total | 473,562 | 497,894
Agricultural & other | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 49,130 | 67,569
Year Two | 58,948 | 55,904
Year Three | 50,019 | 39,473
Year Four | 35,545 | 28,220
Year Five | 25,854 | 15,195
Prior | 55,739 | 48,203
Revolving Loans Amortized Cost Basis | 198,099 | 242,818
Total | 473,334 | 497,382
Agricultural & other | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 71
Year Two | 4 | 33
Year Three | 28 | 10
Year Four | 46 | 0
Year Five | 0 | 0
Prior | 29 | 34
Revolving Loans Amortized Cost Basis | 121 | 364
Total | $ 228 | $ 512

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