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Loans and Allowance for Credit Losses - Age Analysis of Past Due Loans by Segment (Detail) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 8,901,725 | $ 7,642,143
Commercial, financial, agricultural and other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,496,021 | 1,211,706
Commercial, financial, agricultural and other [Member] | Time and Demand Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,189,604 | 1,023,824
Commercial, financial, agricultural and other [Member] | Commercial Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 12,934 | 13,920
Commercial, financial, agricultural and other [Member] | Time and Demand Loans Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 103,367 | 94,288
Commercial, financial, agricultural and other [Member] | Equipment Finance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 190,116 | 79,674
Real estate construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 575,547 | 513,101
Real estate construction [Member] | Construction Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 66,672 | 117,662
Real estate construction [Member] | Construction Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 508,875 | 395,439
Residential real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,414,781 | 2,194,669
Residential real estate [Member] | Senior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,737,203 | 1,547,192
Residential real estate [Member] | Junior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 677,578 | 647,477
Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,050,084 | 2,425,012
Commercial Real Estate [Member] | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 537,565 | 431,151
Commercial Real Estate [Member] | Nonowner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,806,738 | 1,510,347
Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 705,781 | 483,514
Loans to individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,365,292 | 1,297,655
Loans to individuals [Member] | Automobiles |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,285,380 | 1,210,451
Loans to individuals [Member] | Consumer Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 9,997 | 10,657
Loans to individuals [Member] | Other Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 69,915 | 76,547
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 13,713 | 15,896
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,112 | 1,233
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Time and Demand Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,630 | 1,121
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Commercial Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 97 | 27
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Time and Demand Loans Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1 | 85
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Equipment Finance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 384 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Real estate construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 502
Financial Asset, 30 to 59 Days Past Due [Member] | Real estate construction [Member] | Construction Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 502
Financial Asset, 30 to 59 Days Past Due [Member] | Real estate construction [Member] | Construction Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Residential real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,905 | 3,023
Financial Asset, 30 to 59 Days Past Due [Member] | Residential real estate [Member] | Senior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,665 | 1,547
Financial Asset, 30 to 59 Days Past Due [Member] | Residential real estate [Member] | Junior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,240 | 1,476
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,436 | 7,870
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member] | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 117 | 202
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member] | Nonowner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 592 | 7,547
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,727 | 121
Financial Asset, 30 to 59 Days Past Due [Member] | Loans to individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,260 | 3,268
Financial Asset, 30 to 59 Days Past Due [Member] | Loans to individuals [Member] | Automobiles |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,890 | 2,694
Financial Asset, 30 to 59 Days Past Due [Member] | Loans to individuals [Member] | Consumer Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 37 | 53
Financial Asset, 30 to 59 Days Past Due [Member] | Loans to individuals [Member] | Other Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 333 | 521
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 6,244 | 2,053
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 956 | 279
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Time and Demand Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 737 | 270
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Commercial Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 18 | 9
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Time and Demand Loans Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Equipment Finance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 201 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Real estate construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,678 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Real estate construction [Member] | Construction Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Real estate construction [Member] | Construction Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,678 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,709 | 1,178
Financial Asset, 60 to 89 Days Past Due [Member] | Residential real estate [Member] | Senior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,306 | 771
Financial Asset, 60 to 89 Days Past Due [Member] | Residential real estate [Member] | Junior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 403 | 407
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 294 | 25
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member] | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member] | Nonowner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 49 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 245 | 25
Financial Asset, 60 to 89 Days Past Due [Member] | Loans to individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,607 | 571
Financial Asset, 60 to 89 Days Past Due [Member] | Loans to individuals [Member] | Automobiles |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,067 | 368
Financial Asset, 60 to 89 Days Past Due [Member] | Loans to individuals [Member] | Consumer Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 45 | 29
Financial Asset, 60 to 89 Days Past Due [Member] | Loans to individuals [Member] | Other Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 495 | 174
Non Accrual Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 47,924 | 29,045
Non Accrual Loans [Member] | Commercial, financial, agricultural and other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 17,900 | 2,374
Non Accrual Loans [Member] | Commercial, financial, agricultural and other [Member] | Time and Demand Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 17,519 | 2,374
Non Accrual Loans [Member] | Commercial, financial, agricultural and other [Member] | Commercial Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Non Accrual Loans [Member] | Commercial, financial, agricultural and other [Member] | Time and Demand Loans Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Non Accrual Loans [Member] | Commercial, financial, agricultural and other [Member] | Equipment Finance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 381 | 0
Non Accrual Loans [Member] | Real estate construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,288 | 0
Non Accrual Loans [Member] | Real estate construction [Member] | Construction Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Non Accrual Loans [Member] | Real estate construction [Member] | Construction Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,288 | 0
Non Accrual Loans [Member] | Residential real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 7,750 | 5,683
Non Accrual Loans [Member] | Residential real estate [Member] | Senior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,883 | 3,369
Non Accrual Loans [Member] | Residential real estate [Member] | Junior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,867 | 2,314
Non Accrual Loans [Member] | Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 18,784 | 20,539
Non Accrual Loans [Member] | Commercial Real Estate [Member] | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 68 | 0
Non Accrual Loans [Member] | Commercial Real Estate [Member] | Nonowner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 16,176 | 19,575
Non Accrual Loans [Member] | Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,540 | 964
Non Accrual Loans [Member] | Loans to individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 202 | 449
Non Accrual Loans [Member] | Loans to individuals [Member] | Automobiles |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 200 | 361
Non Accrual Loans [Member] | Loans to individuals [Member] | Consumer Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Non Accrual Loans [Member] | Loans to individuals [Member] | Other Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2 | 88
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,484 | 1,991
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 532 | 355
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Time and Demand Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 531 | 352
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Commercial Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Time and Demand Loans Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1 | 3
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial, financial, agricultural and other [Member] | Equipment Finance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real estate construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real estate construction [Member] | Construction Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real estate construction [Member] | Construction Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,203 | 811
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential real estate [Member] | Senior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 599 | 214
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential real estate [Member] | Junior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 604 | 597
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 300 | 93
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member] | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member] | Nonowner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 92
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 300 | 1
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans to individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 449 | 732
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans to individuals [Member] | Automobiles |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 99 | 295
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans to individuals [Member] | Consumer Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 5
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans to individuals [Member] | Other Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 350 | 432
Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 70,365 | 48,985
Financial Asset, Past Due | Commercial, financial, agricultural and other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 21,500 | 4,241
Financial Asset, Past Due | Commercial, financial, agricultural and other [Member] | Time and Demand Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 20,417 | 4,117
Financial Asset, Past Due | Commercial, financial, agricultural and other [Member] | Commercial Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 115 | 36
Financial Asset, Past Due | Commercial, financial, agricultural and other [Member] | Time and Demand Loans Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2 | 88
Financial Asset, Past Due | Commercial, financial, agricultural and other [Member] | Equipment Finance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 966 | 0
Financial Asset, Past Due | Real estate construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,966 | 502
Financial Asset, Past Due | Real estate construction [Member] | Construction Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 502
Financial Asset, Past Due | Real estate construction [Member] | Construction Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,966 | 0
Financial Asset, Past Due | Residential real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 15,567 | 10,695
Financial Asset, Past Due | Residential real estate [Member] | Senior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,453 | 5,901
Financial Asset, Past Due | Residential real estate [Member] | Junior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 7,114 | 4,794
Financial Asset, Past Due | Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 21,814 | 28,527
Financial Asset, Past Due | Commercial Real Estate [Member] | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 185 | 202
Financial Asset, Past Due | Commercial Real Estate [Member] | Nonowner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 16,817 | 27,214
Financial Asset, Past Due | Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,812 | 1,111
Financial Asset, Past Due | Loans to individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 6,518 | 5,020
Financial Asset, Past Due | Loans to individuals [Member] | Automobiles |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 5,256 | 3,718
Financial Asset, Past Due | Loans to individuals [Member] | Consumer Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 82 | 87
Financial Asset, Past Due | Loans to individuals [Member] | Other Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,180 | 1,215
Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,831,360 | 7,593,158
Financial Asset, Not Past Due | Commercial, financial, agricultural and other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,474,521 | 1,207,465
Financial Asset, Not Past Due | Commercial, financial, agricultural and other [Member] | Time and Demand Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,169,187 | 1,019,707
Financial Asset, Not Past Due | Commercial, financial, agricultural and other [Member] | Commercial Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 12,819 | 13,884
Financial Asset, Not Past Due | Commercial, financial, agricultural and other [Member] | Time and Demand Loans Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 103,365 | 94,200
Financial Asset, Not Past Due | Commercial, financial, agricultural and other [Member] | Equipment Finance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 189,150 | 79,674
Financial Asset, Not Past Due | Real estate construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 570,581 | 512,599
Financial Asset, Not Past Due | Real estate construction [Member] | Construction Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 66,672 | 117,160
Financial Asset, Not Past Due | Real estate construction [Member] | Construction Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 503,909 | 395,439
Financial Asset, Not Past Due | Residential real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,399,214 | 2,183,974
Financial Asset, Not Past Due | Residential real estate [Member] | Senior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,728,750 | 1,541,291
Financial Asset, Not Past Due | Residential real estate [Member] | Junior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 670,464 | 642,683
Financial Asset, Not Past Due | Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,028,270 | 2,396,485
Financial Asset, Not Past Due | Commercial Real Estate [Member] | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 537,380 | 430,949
Financial Asset, Not Past Due | Commercial Real Estate [Member] | Nonowner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,789,921 | 1,483,133
Financial Asset, Not Past Due | Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 700,969 | 482,403
Financial Asset, Not Past Due | Loans to individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,358,774 | 1,292,635
Financial Asset, Not Past Due | Loans to individuals [Member] | Automobiles |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,280,124 | 1,206,733
Financial Asset, Not Past Due | Loans to individuals [Member] | Consumer Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 9,915 | 10,570
Financial Asset, Not Past Due | Loans to individuals [Member] | Other Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 68,735 | $ 75,332

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