v3.26.1
Allowance for Credit Losses, Credit Quality and Other - Summary of Amortized Cost of Performing and Nonperforming Loans (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One $ 1,643,303 $ 2,820,916
Year Two 2,997,870 2,160,404
Year Three 2,033,517 1,758,038
Year Four 1,352,289 2,655,695
Year Five 2,646,927 1,337,604
Prior 3,934,281 3,070,063
Revolving Loans Amortized Cost Basis 2,519,021 1,883,489
Total 17,127,208 15,686,209
Commercial real estate loans    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 917,343 1,438,572
Year Two 1,777,552 1,469,083
Year Three 1,265,951 614,895
Year Four 640,327 1,492,474
Year Five 1,446,703 783,211
Prior 2,315,443 1,809,333
Revolving Loans Amortized Cost Basis 667,857 741,949
Total 9,031,176 8,349,517
Commercial real estate loans | Non-farm/non-residential    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 489,610 590,656
Year Two 721,167 352,861
Year Three 498,706 352,711
Year Four 437,358 1,174,688
Year Five 1,243,349 711,418
Prior 2,142,360 1,660,676
Revolving Loans Amortized Cost Basis 389,279 447,102
Total 5,921,829 5,290,112
Commercial real estate loans | Non-farm/non-residential | Performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 489,350 590,656
Year Two 721,022 319,429
Year Three 465,209 352,286
Year Four 436,045 1,147,293
Year Five 1,212,713 709,851
Prior 2,116,675 1,629,945
Revolving Loans Amortized Cost Basis 389,279 447,102
Total 5,830,293 5,196,562
Commercial real estate loans | Non-farm/non-residential | Non-performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 260 0
Year Two 145 33,432
Year Three 33,497 425
Year Four 1,313 27,395
Year Five 30,636 1,567
Prior 25,685 30,731
Revolving Loans Amortized Cost Basis 0 0
Total 91,536 93,550
Commercial real estate loans | Construction/land development    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 398,870 803,545
Year Two 1,005,965 1,069,376
Year Three 719,083 238,533
Year Four 185,043 268,726
Year Five 162,800 38,802
Prior 94,036 76,159
Revolving Loans Amortized Cost Basis 214,319 231,852
Total 2,780,116 2,726,993
Commercial real estate loans | Construction/land development | Performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 398,870 803,545
Year Two 1,005,826 1,065,095
Year Three 711,890 238,336
Year Four 185,043 268,292
Year Five 162,516 38,502
Prior 93,503 75,522
Revolving Loans Amortized Cost Basis 214,289 231,852
Total 2,771,937 2,721,144
Commercial real estate loans | Construction/land development | Non-performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 0 0
Year Two 139 4,281
Year Three 7,193 197
Year Four 0 434
Year Five 284 300
Prior 533 637
Revolving Loans Amortized Cost Basis 30 0
Total 8,179 5,849
Commercial real estate loans | Agricultural    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 28,863 44,371
Year Two 50,420 46,846
Year Three 48,162 23,651
Year Four 17,926 49,060
Year Five 40,554 32,991
Prior 79,047 72,498
Revolving Loans Amortized Cost Basis 64,259 62,995
Total 329,231 332,412
Commercial real estate loans | Agricultural | Performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 28,863 44,371
Year Two 50,420 46,846
Year Three 48,162 23,651
Year Four 17,926 49,060
Year Five 39,779 32,991
Prior 78,323 72,021
Revolving Loans Amortized Cost Basis 64,088 62,983
Total 327,561 331,923
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 775 0
Prior 724 477
Revolving Loans Amortized Cost Basis 171 12
Total 1,670 489
Residential real estate loans | Residential 1-4 family    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 188,277 299,334
Year Two 254,387 216,176
Year Three 227,571 249,480
Year Four 268,018 407,424
Year Five 518,605 271,880
Prior 817,179 485,085
Revolving Loans Amortized Cost Basis 271,425 204,955
Total 2,545,462 2,134,334
Residential real estate loans | Residential 1-4 family | Performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 188,277 299,149
Year Two 253,321 215,558
Year Three 225,619 244,767
Year Four 262,728 400,643
Year Five 511,784 267,493
Prior 801,990 472,717
Revolving Loans Amortized Cost Basis 271,062 204,605
Total 2,514,781 2,104,932
Residential real estate loans | Residential 1-4 family | Non-performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 0 185
Year Two 1,066 618
Year Three 1,952 4,713
Year Four 5,290 6,781
Year Five 6,821 4,387
Prior 15,189 12,368
Revolving Loans Amortized Cost Basis 363 350
Total 30,681 29,402
Residential real estate loans | Multifamily residential    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 93,943 238,225
Year Two 250,907 55,750
Year Three 160,887 257,383
Year Four 147,123 379,075
Year Five 376,789 41,006
Prior 205,716 130,411
Revolving Loans Amortized Cost Basis 34,363 39,061
Total 1,269,728 1,140,911
Residential real estate loans | Multifamily residential | Performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 93,943 238,225
Year Two 250,907 55,750
Year Three 160,887 257,383
Year Four 147,123 368,962
Year Five 366,420 41,006
Prior 203,694 129,599
Revolving Loans Amortized Cost Basis 34,363 39,061
Total 1,257,337 1,129,986
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 10,113
Year Five 10,369 0
Prior 2,022 812
Revolving Loans Amortized Cost Basis 0 0
Total 12,391 10,925
Total real estate    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 1,199,563 1,976,131
Year Two 2,282,846 1,741,009
Year Three 1,654,409 1,121,758
Year Four 1,055,468 2,278,973
Year Five 2,342,097 1,096,097
Prior 3,338,338 2,424,829
Revolving Loans Amortized Cost Basis 973,645 985,965
Total 12,846,366 11,624,762
Consumer    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 137,583 285,203
Year Two 266,547 233,643
Year Three 211,990 158,949
Year Four 138,733 162,563
Year Five 145,886 142,858
Prior 367,822 267,504
Revolving Loans Amortized Cost Basis 9,447 3,026
Total 1,278,008 1,253,746
Consumer | Performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 137,578 285,182
Year Two 266,249 232,580
Year Three 210,947 153,116
Year Four 133,233 160,625
Year Five 143,881 142,817
Prior 364,524 262,786
Revolving Loans Amortized Cost Basis 9,443 3,024
Total 1,265,855 1,240,130
Consumer | Non-performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 5 21
Year Two 298 1,063
Year Three 1,043 5,833
Year Four 5,500 1,938
Year Five 2,005 41
Prior 3,298 4,718
Revolving Loans Amortized Cost Basis 4 2
Total 12,153 13,616
Commercial and industrial    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 122,469 483,726
Year Two 435,268 170,209
Year Three 156,086 471,285
Year Four 153,486 175,061
Year Five 122,118 71,891
Prior 178,933 331,072
Revolving Loans Amortized Cost Basis 1,116,694 519,157
Total 2,285,054 2,222,401
Commercial and industrial | Performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 122,321 482,817
Year Two 434,424 129,624
Year Three 113,513 471,177
Year Four 152,776 174,639
Year Five 121,947 71,256
Prior 177,486 329,475
Revolving Loans Amortized Cost Basis 1,096,975 499,046
Total 2,219,442 2,158,034
Commercial and industrial | Non-performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 148 909
Year Two 844 40,585
Year Three 42,573 108
Year Four 710 422
Year Five 171 635
Prior 1,447 1,597
Revolving Loans Amortized Cost Basis 19,719 20,111
Total 65,612 64,367
Agricultural & other    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 183,688 75,856
Year Two 13,209 15,543
Year Three 11,032 6,046
Year Four 4,602 39,098
Year Five 36,826 26,758
Prior 49,188 46,658
Revolving Loans Amortized Cost Basis 419,235 375,341
Total 717,780 585,300
Agricultural & other | Performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 183,688 75,856
Year Two 13,209 15,385
Year Three 10,874 5,938
Year Four 4,484 38,786
Year Five 36,514 26,715
Prior 48,496 46,132
Revolving Loans Amortized Cost Basis 419,235 375,264
Total 716,500 584,076
Agricultural & other | Non-performing    
Financing Receivable Allowance For Credit Losses [Line Items]    
Year One 0 0
Year Two 0 158
Year Three 158 108
Year Four 118 312
Year Five 312 43
Prior 692 526
Revolving Loans Amortized Cost Basis 0 77
Total $ 1,280 $ 1,224