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Allowance for Credit Losses, Credit Quality and Other - Summary of Aging Analysis for Loans Receivable (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | $ 15,285,972 | $ 14,764,500
Accruing Loans Past Due 90 Days or More | 4,125 | 5,034
Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 12,385 | 15,145
Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 10,057 | 46,050
Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 85,212 | 98,887
Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 107,654 | 160,082
Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 15,178,318 | 14,604,418
Commercial real estate loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 8,534,990 | 8,499,987
Commercial real estate loans | Non-farm/non-residential |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 5,494,492 | 5,426,780
Accruing Loans Past Due 90 Days or More | 1,136 | 304
Commercial real estate loans | Non-farm/non-residential | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 5,581 | 4,352
Commercial real estate loans | Non-farm/non-residential | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 1,101 | 38,944
Commercial real estate loans | Non-farm/non-residential | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 23,437 | 36,172
Commercial real estate loans | Non-farm/non-residential | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 30,119 | 79,468
Commercial real estate loans | Non-farm/non-residential | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 5,464,373 | 5,347,312
Commercial real estate loans | Construction/land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 2,709,197 | 2,736,214
Accruing Loans Past Due 90 Days or More | 0 | 600
Commercial real estate loans | Construction/land development | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 2,467 | 369
Commercial real estate loans | Construction/land development | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 413 | 799
Commercial real estate loans | Construction/land development | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 3,418 | 4,302
Commercial real estate loans | Construction/land development | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 6,298 | 5,470
Commercial real estate loans | Construction/land development | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 2,702,899 | 2,730,744
Commercial real estate loans | Agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 331,301 | 336,993
Accruing Loans Past Due 90 Days or More | 0 | 0
Commercial real estate loans | Agricultural | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 55 | 90
Commercial real estate loans | Agricultural | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 0 | 43
Commercial real estate loans | Agricultural | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 497 | 559
Commercial real estate loans | Agricultural | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 552 | 692
Commercial real estate loans | Agricultural | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 330,749 | 336,301
Residential real estate loans | Residential 1-4 family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 2,142,375 | 1,956,489
Accruing Loans Past Due 90 Days or More | 1,529 | 1,835
Residential real estate loans | Residential 1-4 family | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 999 | 1,897
Residential real estate loans | Residential 1-4 family | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 7,864 | 4,877
Residential real estate loans | Residential 1-4 family | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 27,076 | 24,374
Residential real estate loans | Residential 1-4 family | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 35,939 | 31,148
Residential real estate loans | Residential 1-4 family | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 2,106,436 | 1,925,341
Residential real estate loans | Multifamily residential |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 716,595 | 496,484
Accruing Loans Past Due 90 Days or More | 0 | 0
Residential real estate loans | Multifamily residential | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 0 | 0
Residential real estate loans | Multifamily residential | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 0 | 0
Residential real estate loans | Multifamily residential | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 12,907 | 13,083
Residential real estate loans | Multifamily residential | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 12,907 | 13,083
Residential real estate loans | Multifamily residential | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 703,688 | 483,401
Total real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 11,393,960 | 10,952,960
Accruing Loans Past Due 90 Days or More | 2,665 | 2,739
Total real estate | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 9,102 | 6,708
Total real estate | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 9,378 | 44,663
Total real estate | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 67,335 | 78,490
Total real estate | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 85,815 | 129,861
Total real estate | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 11,308,145 | 10,823,099
Consumer |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 1,233,523 | 1,234,361
Accruing Loans Past Due 90 Days or More | 4 | 32
Consumer | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 741 | 7,046
Consumer | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 14 | 68
Consumer | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 10,802 | 6,210
Consumer | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 11,557 | 13,324
Consumer | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 1,221,966 | 1,221,037
Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 2,100,268 | 2,022,775
Accruing Loans Past Due 90 Days or More | 1,456 | 2,263
Commercial and industrial | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 1,459 | 309
Commercial and industrial | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 594 | 1,028
Commercial and industrial | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 5,805 | 13,194
Commercial and industrial | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 7,858 | 14,531
Commercial and industrial | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 2,092,410 | 2,008,244
Agricultural & other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 558,221 | 554,404
Accruing Loans Past Due 90 Days or More | 0 | 0
Agricultural & other | Loans Past Due 30-59 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 1,083 | 1,082
Agricultural & other | Loans Past Due 60-89 Days |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 71 | 291
Agricultural & other | Loans Past Due 90 Days or More |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 1,270 | 993
Agricultural & other | Total Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | 2,424 | 2,366
Agricultural & other | Current Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans | $ 555,797 | $ 552,038

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