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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 | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | $ 505,726 | $ 2,197,674
Year Two | 2,253,336 | 2,138,138
Year Three | 2,124,903 | 3,107,235
Year Four | 3,012,491 | 1,554,947
Year Five | 1,509,654 | 867,316
Prior | 3,735,293 | 3,045,313
Revolving Loans Amortized Cost Basis | 1,810,713 | 1,853,877
Total | 14,952,116 | 14,764,500
Commercial real estate loans |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 245,860 | 1,350,313
Year Two | 1,481,662 | 1,037,666
Year Three | 977,676 | 1,947,209
Year Four | 1,896,359 | 938,027
Year Five | 915,135 | 443,400
Prior | 2,231,855 | 1,920,283
Revolving Loans Amortized Cost Basis | 911,331 | 863,089
Total | 8,659,878 | 8,499,987
Commercial real estate loans | Non-farm/non-residential |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 116,031 | 333,198
Year Two | 309,054 | 423,332
Year Three | 478,267 | 1,212,296
Year Four | 1,287,823 | 785,056
Year Five | 765,133 | 363,710
Prior | 2,022,757 | 1,767,050
Revolving Loans Amortized Cost Basis | 609,616 | 542,138
Total | 5,588,681 | 5,426,780
Commercial real estate loans | Non-farm/non-residential | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 116,031 | 301,127
Year Two | 277,146 | 423,332
Year Three | 477,442 | 1,178,297
Year Four | 1,253,353 | 784,102
Year Five | 762,756 | 359,710
Prior | 1,983,193 | 1,712,213
Revolving Loans Amortized Cost Basis | 609,616 | 542,138
Total | 5,479,537 | 5,300,919
Commercial real estate loans | Non-farm/non-residential | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 32,071
Year Two | 31,908 | 0
Year Three | 825 | 33,999
Year Four | 34,470 | 954
Year Five | 2,377 | 4,000
Prior | 39,564 | 54,837
Revolving Loans Amortized Cost Basis | 0 | 0
Total | 109,144 | 125,861
Commercial real estate loans | Construction/land development |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 116,017 | 963,907
Year Two | 1,119,198 | 571,039
Year Three | 456,617 | 676,520
Year Four | 554,247 | 115,480
Year Five | 113,961 | 47,913
Prior | 115,941 | 82,999
Revolving Loans Amortized Cost Basis | 259,779 | 278,356
Total | 2,735,760 | 2,736,214
Commercial real estate loans | Construction/land development | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 116,017 | 963,903
Year Two | 1,119,138 | 570,931
Year Three | 456,509 | 674,668
Year Four | 554,019 | 114,157
Year Five | 113,237 | 47,736
Prior | 115,036 | 82,199
Revolving Loans Amortized Cost Basis | 259,743 | 278,319
Total | 2,733,699 | 2,731,913
Commercial real estate loans | Construction/land development | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 4
Year Two | 60 | 108
Year Three | 108 | 1,852
Year Four | 228 | 1,323
Year Five | 724 | 177
Prior | 905 | 800
Revolving Loans Amortized Cost Basis | 36 | 37
Total | 2,061 | 4,301
Commercial real estate loans | Agricultural |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 13,812 | 53,208
Year Two | 53,410 | 43,295
Year Three | 42,792 | 58,393
Year Four | 54,289 | 37,491
Year Five | 36,041 | 31,777
Prior | 93,157 | 70,234
Revolving Loans Amortized Cost Basis | 41,936 | 42,595
Total | 335,437 | 336,993
Commercial real estate loans | Agricultural | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 13,812 | 53,208
Year Two | 53,410 | 43,295
Year Three | 42,792 | 58,393
Year Four | 54,289 | 37,491
Year Five | 36,041 | 31,777
Prior | 92,803 | 69,863
Revolving Loans Amortized Cost Basis | 41,752 | 42,407
Total | 334,899 | 336,434
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 | 0
Year Four | 0 | 0
Year Five | 0 | 0
Prior | 354 | 371
Revolving Loans Amortized Cost Basis | 184 | 188
Total | 538 | 559
Residential real estate loans | Residential 1-4 family |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 57,864 | 235,119
Year Two | 198,421 | 255,492
Year Three | 259,235 | 422,926
Year Four | 420,531 | 250,947
Year Five | 244,440 | 150,113
Prior | 552,619 | 426,755
Revolving Loans Amortized Cost Basis | 214,762 | 215,137
Total | 1,947,872 | 1,956,489
Residential real estate loans | Residential 1-4 family | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 57,864 | 235,119
Year Two | 197,574 | 252,691
Year Three | 256,092 | 416,981
Year Four | 414,677 | 247,959
Year Five | 241,331 | 146,817
Prior | 539,699 | 415,401
Revolving Loans Amortized Cost Basis | 214,653 | 214,972
Total | 1,921,890 | 1,929,940
Residential real estate loans | Residential 1-4 family | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 0
Year Two | 847 | 2,801
Year Three | 3,143 | 5,945
Year Four | 5,854 | 2,988
Year Five | 3,109 | 3,296
Prior | 12,920 | 11,354
Revolving Loans Amortized Cost Basis | 109 | 165
Total | 25,982 | 26,549
Residential real estate loans | Multifamily residential |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 1,604 | 4,041
Year Two | 3,045 | 11,699
Year Three | 92,588 | 206,971
Year Four | 210,457 | 49,322
Year Five | 48,717 | 109,809
Prior | 201,221 | 94,772
Revolving Loans Amortized Cost Basis | 18,457 | 19,870
Total | 576,089 | 496,484
Residential real estate loans | Multifamily residential | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 1,604 | 4,041
Year Two | 3,045 | 11,699
Year Three | 92,588 | 194,474
Year Four | 197,961 | 48,736
Year Five | 48,139 | 109,809
Prior | 201,221 | 94,772
Revolving Loans Amortized Cost Basis | 18,457 | 19,870
Total | 563,015 | 483,401
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 | 12,497
Year Four | 12,496 | 586
Year Five | 578 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Total | 13,074 | 13,083
Total real estate |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 305,328 | 1,589,473
Year Two | 1,683,128 | 1,304,857
Year Three | 1,329,499 | 2,577,106
Year Four | 2,527,347 | 1,238,296
Year Five | 1,208,292 | 703,322
Prior | 2,985,695 | 2,441,810
Revolving Loans Amortized Cost Basis | 1,144,550 | 1,098,096
Total | 11,183,839 | 10,952,960
Consumer |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 77,199 | 281,031
Year Two | 272,006 | 220,837
Year Three | 199,157 | 216,978
Year Four | 188,748 | 175,880
Year Five | 163,382 | 88,720
Prior | 324,128 | 247,924
Revolving Loans Amortized Cost Basis | 3,125 | 2,991
Total | 1,227,745 | 1,234,361
Consumer | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 77,199 | 280,956
Year Two | 271,981 | 215,196
Year Three | 193,548 | 214,938
Year Four | 186,651 | 175,706
Year Five | 163,269 | 88,409
Prior | 317,981 | 241,992
Revolving Loans Amortized Cost Basis | 3,119 | 2,936
Total | 1,213,748 | 1,220,133
Consumer | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 75
Year Two | 25 | 5,641
Year Three | 5,609 | 2,040
Year Four | 2,097 | 174
Year Five | 113 | 311
Prior | 6,147 | 5,932
Revolving Loans Amortized Cost Basis | 6 | 55
Total | 13,997 | 14,228
Commercial and industrial |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 66,098 | 259,442
Year Two | 242,620 | 566,916
Year Three | 580,228 | 266,801
Year Four | 253,629 | 107,310
Year Five | 106,886 | 50,457
Prior | 357,509 | 308,754
Revolving Loans Amortized Cost Basis | 438,066 | 463,095
Total | 2,045,036 | 2,022,775
Commercial and industrial | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 66,098 | 212,469
Year Two | 196,112 | 564,063
Year Three | 577,322 | 263,604
Year Four | 249,938 | 106,405
Year Five | 105,277 | 50,453
Prior | 354,022 | 300,351
Revolving Loans Amortized Cost Basis | 420,956 | 443,008
Total | 1,969,725 | 1,940,353
Commercial and industrial | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 46,973
Year Two | 46,508 | 2,853
Year Three | 2,906 | 3,197
Year Four | 3,691 | 905
Year Five | 1,609 | 4
Prior | 3,487 | 8,403
Revolving Loans Amortized Cost Basis | 17,110 | 20,087
Total | 75,311 | 82,422
Agricultural & other |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 57,101 | 67,728
Year Two | 55,582 | 45,528
Year Three | 16,019 | 46,350
Year Four | 42,767 | 33,461
Year Five | 31,094 | 24,817
Prior | 67,961 | 46,825
Revolving Loans Amortized Cost Basis | 224,972 | 289,695
Total | 495,496 | 554,404
Agricultural & other | Performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 57,101 | 67,728
Year Two | 55,582 | 45,525
Year Three | 16,016 | 46,350
Year Four | 42,455 | 33,422
Year Five | 31,055 | 24,815
Prior | 67,409 | 45,922
Revolving Loans Amortized Cost Basis | 224,925 | 289,649
Total | 494,543 | 553,411
Agricultural & other | Non-performing |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Year One | 0 | 0
Year Two | 0 | 3
Year Three | 3 | 0
Year Four | 312 | 39
Year Five | 39 | 2
Prior | 552 | 903
Revolving Loans Amortized Cost Basis | 47 | 46
Total | $ 953 | $ 993

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