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Loans and Allowance for Credit Losses - Age Analysis of Past Due Loans by Segment (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | $ 7,642,143 | $ 6,839,230
Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,297,655 | 999,975
Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,211,706 | 1,173,452
Real Estate Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 513,101 | 494,456
Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,194,669 | 1,920,250
Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,425,012 | 2,251,097
Time and demand loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,023,824 | 1,159,524
Time and demand loans | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,023,824 | 1,159,524
Commercial credit cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 13,920 | 13,928
Commercial credit cards | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 13,920 | 13,928
Senior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,547,192 | 1,299,534
Senior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,547,192 | 1,299,534
Junior Lien |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 647,477 | 620,716
Junior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 647,477 | 620,716
Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 431,151 | 385,432
Multifamily | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 431,151 | 385,432
Nonowner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,510,347 | 1,465,247
Nonowner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,510,347 | 1,465,247
Owner Occupied Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 483,514 | 400,418
Owner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 483,514 | 400,418
Automobile Loan |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,210,451 | 901,280
Automobile Loan | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,210,451 | 901,280
Consumer Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 10,657 | 11,151
Consumer Credit Cards | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 10,657 | 11,151
Other consumer loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 76,547 | 87,544
Other consumer loans | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 76,547 | 87,544
Equipment Finance |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 79,674 |
Equipment Finance | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 79,674 |
Time and Demand Loans Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 94,288 |
Time and Demand Loans Other | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 94,288 |
Construction Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 117,662 |
Construction Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 117,662 |
Construction Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 395,439 |
Construction Other | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 395,439 |
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 15,896 | 6,450
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 | 3,268 | 1,611
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,233 | 633
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 | 502 | 813
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 | 3,023 | 3,393
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 | 7,870 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Time and demand loans | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,121 | 605
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial credit cards | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 27 | 28
Financial Asset, 30 to 59 Days Past Due [Member] | Senior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,547 | 1,934
Financial Asset, 30 to 59 Days Past Due [Member] | Junior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,476 | 1,459
Financial Asset, 30 to 59 Days Past Due [Member] | Multifamily | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 202 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Nonowner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 7,547 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 121 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Automobile Loan | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,694 | 1,228
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Credit Cards | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 53 | 36
Financial Asset, 30 to 59 Days Past Due [Member] | Other consumer loans | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 521 | 347
Financial Asset, 30 to 59 Days Past Due [Member] | Equipment Finance | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Time and Demand Loans Other | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 85 |
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 502 |
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Other | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,053 | 2,461
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 | 571 | 417
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 279 | 987
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 | 0 | 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 | 1,178 | 983
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 | 25 | 74
Financial Asset, 60 to 89 Days Past Due [Member] | Time and demand loans | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 270 | 972
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial credit cards | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 9 | 15
Financial Asset, 60 to 89 Days Past Due [Member] | Senior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 771 | 354
Financial Asset, 60 to 89 Days Past Due [Member] | Junior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 407 | 629
Financial Asset, 60 to 89 Days Past Due [Member] | Multifamily | Commercial real estate [Member] |  |
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] | Nonowner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
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] | Owner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 25 | 74
Financial Asset, 60 to 89 Days Past Due [Member] | Automobile Loan | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 368 | 175
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Credit Cards | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 29 | 44
Financial Asset, 60 to 89 Days Past Due [Member] | Other consumer loans | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 174 | 198
Financial Asset, 60 to 89 Days Past Due [Member] | Equipment Finance | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Time and Demand Loans Other | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Other | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
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 | 1,991 | 1,606
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 | 732 | 785
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 355 | 155
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 | 448
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 | 811 | 218
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 | 93 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Time and demand loans | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 352 | 144
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial credit cards | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 | 11
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Senior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 214 | 51
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Junior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 597 | 167
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Multifamily | Commercial real estate [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] | Nonowner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 92 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Automobile Loan | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 295 | 199
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Credit Cards | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 5 | 63
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other consumer loans | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 432 | 523
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Equipment Finance | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Time and Demand Loans Other | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 3 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Other | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Nonaccrual Commercial Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 29,045 | 48,060
Nonaccrual Commercial Loans [Member] | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 449 | 206
Nonaccrual Commercial Loans [Member] | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,374 | 2,006
Nonaccrual Commercial Loans [Member] | Real Estate Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 | 45
Nonaccrual Commercial Loans [Member] | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 5,683 | 5,608
Nonaccrual Commercial Loans [Member] | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 20,539 | 40,195
Nonaccrual Commercial Loans [Member] | Time and demand loans | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,374 | 2,006
Nonaccrual Commercial Loans [Member] | Commercial credit cards | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 | 0
Nonaccrual Commercial Loans [Member] | Senior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 3,369 | 2,706
Nonaccrual Commercial Loans [Member] | Junior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,314 | 2,902
Nonaccrual Commercial Loans [Member] | Multifamily | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 | 15,097
Nonaccrual Commercial Loans [Member] | Nonowner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 19,575 | 23,930
Nonaccrual Commercial Loans [Member] | Owner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 964 | 1,168
Nonaccrual Commercial Loans [Member] | Automobile Loan | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 361 | 148
Nonaccrual Commercial Loans [Member] | Consumer Credit Cards | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 | 0
Nonaccrual Commercial Loans [Member] | Other consumer loans | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 88 | 58
Nonaccrual Commercial Loans [Member] | Equipment Finance | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Nonaccrual Commercial Loans [Member] | Time and Demand Loans Other | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Nonaccrual Commercial Loans [Member] | Construction Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Nonaccrual Commercial Loans [Member] | Construction Other | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 48,985 | 58,577
Financial Asset, Past Due | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 5,020 | 3,019
Financial Asset, Past Due | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 4,241 | 3,781
Financial Asset, Past Due | Real Estate Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 502 | 1,306
Financial Asset, Past Due | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 10,695 | 10,202
Financial Asset, Past Due | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 28,527 | 40,269
Financial Asset, Past Due | Time and demand loans | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 4,117 | 3,727
Financial Asset, Past Due | Commercial credit cards | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 36 | 54
Financial Asset, Past Due | Senior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 5,901 | 5,045
Financial Asset, Past Due | Junior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 4,794 | 5,157
Financial Asset, Past Due | Multifamily | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 202 | 15,097
Financial Asset, Past Due | Nonowner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 27,214 | 23,930
Financial Asset, Past Due | Owner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,111 | 1,242
Financial Asset, Past Due | Automobile Loan | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 3,718 | 1,750
Financial Asset, Past Due | Consumer Credit Cards | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 87 | 143
Financial Asset, Past Due | Other consumer loans | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,215 | 1,126
Financial Asset, Past Due | Equipment Finance | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, Past Due | Time and Demand Loans Other | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 88 |
Financial Asset, Past Due | Construction Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 502 |
Financial Asset, Past Due | Construction Other | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 0 |
Financial Asset, Not Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 7,593,158 | 6,780,653
Financial Asset, Not Past Due | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,292,635 | 996,956
Financial Asset, Not Past Due | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,207,465 | 1,169,671
Financial Asset, Not Past Due | Real Estate Construction [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 512,599 | 493,150
Financial Asset, Not Past Due | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,183,974 | 1,910,048
Financial Asset, Not Past Due | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 2,396,485 | 2,210,828
Financial Asset, Not Past Due | Time and demand loans | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,019,707 | 1,155,797
Financial Asset, Not Past Due | Commercial credit cards | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 13,884 | 13,874
Financial Asset, Not Past Due | Senior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,541,291 | 1,294,489
Financial Asset, Not Past Due | Junior Lien | Residential Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 642,683 | 615,559
Financial Asset, Not Past Due | Multifamily | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 430,949 | 370,335
Financial Asset, Not Past Due | Nonowner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,483,133 | 1,441,317
Financial Asset, Not Past Due | Owner Occupied Commercial Real Estate | Commercial real estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 482,403 | 399,176
Financial Asset, Not Past Due | Automobile Loan | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 1,206,733 | 899,530
Financial Asset, Not Past Due | Consumer Credit Cards | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 10,570 | 11,008
Financial Asset, Not Past Due | Other consumer loans | Loans To Individuals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 75,332 | $ 86,418
Financial Asset, Not Past Due | Equipment Finance | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 79,674 |
Financial Asset, Not Past Due | Time and Demand Loans Other | Commercial Loan [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 94,200 |
Financial Asset, Not Past Due | Construction Residential | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | 117,160 |
Financial Asset, Not Past Due | Construction Other | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, before allowance for credit loss | $ 395,439 |

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