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Fair Values of Assets and Liabilities - Schedule of Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | $ (1,041,380)
Assets, Fair Value Disclosure | $ 869,373 | 1,114,587
Balance, beginning of period | 16,151 | 8,289
Total gains or losses included in earnings |  | 0
Total gains or losses included in other comprehensive income | 0 | 0
Purchases | 2,991 | 8,511
Issuances | 0 | 0
Sales | (281) | 0
Settlements | 0 | (649)
Transfers from Level 3 | 0 | 0
Transfers into Level 3 | 0 | 0
Balance, end of period | 18,861 | 16,151
Other Investments | 26,414 | 12,838
Loans Held-for-sale, Fair Value Disclosure | 11,869 | 18,583
Other Assets, Fair Value Disclosure | 68,429 | 41,786
Other Liabilities, Fair Value Disclosure | 89,298 | 34,263
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 89,298 | 34,263
Equity Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Balance, beginning of period | 1,170 | 1,670
Total gains or losses included in earnings | 0 | 0
Total gains or losses included in other comprehensive income | 0 | 0
Purchases | 0 | 0
Issuances | 0 | 0
Sales | 0 | 0
Settlements | 0 | (500)
Transfers from Level 3 | 0 | 0
Transfers into Level 3 | 0 | 0
Balance, end of period | 1,170 | 1,170
Other Assets [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Balance, beginning of period | 14,981 | 6,619
Total gains or losses included in earnings | 0 | 0
Total gains or losses included in other comprehensive income | 0 | 0
Purchases | 2,991 | 8,511
Issuances | 0 | 0
Sales | (281) | 0
Settlements | 0 | (149)
Transfers from Level 3 | 0 | 0
Transfers into Level 3 | 0 |
Balance, end of period | 17,691 | 14,981
Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (32,949)
US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (5,662)
US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (362,290)
Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (629,974)
Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government - Sponsored Enterprises [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (981)
Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (9,524)
Level 1 [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Assets, Fair Value Disclosure | 0 | 0
Other Investments | 0 |
Loans Held-for-sale, Fair Value Disclosure | 0 | 0
Other Assets, Fair Value Disclosure | 0 | 0
Other Liabilities, Fair Value Disclosure | 0 | 0
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 0 | 0
Level 1 [Member] | Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Level 1 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Level 1 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Level 1 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Level 1 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government - Sponsored Enterprises [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Level 1 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (1,041,380)
Assets, Fair Value Disclosure | 850,512 | 1,098,436
Other Investments | 25,244 | 11,668
Loans Held-for-sale, Fair Value Disclosure | 11,869 | 18,583
Other Assets, Fair Value Disclosure | 50,738 | 26,805
Other Liabilities, Fair Value Disclosure | 89,298 | 34,263
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 89,298 | 34,263
Fair Value, Inputs, Level 2 [Member] | Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (32,949)
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (5,662)
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (362,290)
Fair Value, Inputs, Level 2 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (629,974)
Fair Value, Inputs, Level 2 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government - Sponsored Enterprises [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (981)
Fair Value, Inputs, Level 2 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | (9,524)
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Assets, Fair Value Disclosure | 18,861 | 16,151
Loans Held-for-sale, Fair Value Disclosure | 0 | 0
Other Assets, Fair Value Disclosure | 17,691 | 14,981
Other Liabilities, Fair Value Disclosure | 0 | 0
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Other Investments | $ 1,170 | 1,170
Fair Value, Inputs, Level 3 [Member] | Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Fair Value, Inputs, Level 3 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Fair Value, Inputs, Level 3 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government - Sponsored Enterprises [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | 0
Fair Value, Inputs, Level 3 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Securities available for sale, at fair value |  | $ 0

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