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Fair Values of Assets and Liabilities - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | $ 1,041,380
Other investments | $ 25,200 | 11,700
Other Investments | 26,414 | 12,838
Loans Held for Sale | 11,869 | 18,583
Other Assets | 68,429 | 41,786
Total Assets | (869,373) | (1,114,587)
Other Liabilities | 89,298 | 34,263
Total Liabilities | 89,298 | 34,263
Debt Securities, Available-for-Sale | 762,661 | 1,041,380
US Government Agencies Debt Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 275,400 |
US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 5,662
Debt Securities, Available-for-Sale | 3,983 |
US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 362,290
Debt Securities, Available-for-Sale | 271,416 |
Obligations of U.S. Government-Sponsored Enterprises [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 449,000 |
Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 629,974
Debt Securities, Available-for-Sale | 448,989 |
Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government - Sponsored Enterprises [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 981
Debt Securities, Available-for-Sale | 882 |
Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 9,524
Debt Securities, Available-for-Sale | 8,187 |
Corporate Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 32,949
Debt Securities, Available-for-Sale | 29,204 |
Level 1 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Other investments |  | 0
Other Investments | 0 |
Loans Held for Sale | 0 | 0
Other Assets | 0 | 0
Total Assets | 0 | 0
Other Liabilities | 0 | 0
Total Liabilities | 0 | 0
Debt Securities, Available-for-Sale | 0 |
Level 1 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 1 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 1 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 1 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government - Sponsored Enterprises [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 1 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 1 [Member] | Corporate Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 1,041,380
Other Investments | 25,244 | 11,668
Loans Held for Sale | 11,869 | 18,583
Other Assets | 50,738 | 26,805
Total Assets | (850,512) | (1,098,436)
Other Liabilities | 89,298 | 34,263
Total Liabilities | 89,298 | 34,263
Debt Securities, Available-for-Sale | 762,661 |
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 5,662
Debt Securities, Available-for-Sale | 3,983 |
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 362,290
Debt Securities, Available-for-Sale | 271,416 |
Fair Value, Inputs, Level 2 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 629,974
Debt Securities, Available-for-Sale | 448,989 |
Fair Value, Inputs, Level 2 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government - Sponsored Enterprises [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 981
Debt Securities, Available-for-Sale | 882 |
Fair Value, Inputs, Level 2 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 9,524
Debt Securities, Available-for-Sale | 8,187 |
Fair Value, Inputs, Level 2 [Member] | Corporate Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 32,949
Debt Securities, Available-for-Sale | 29,204 |
Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Loans Held for Sale | 0 | 0
Other Assets | 17,691 | 14,981
Total Assets | (18,861) | (16,151)
Other Liabilities | 0 | 0
Total Liabilities | 0 | 0
Debt Securities, Available-for-Sale | 0 |
Level 3 [Member] | Equity Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other Investments | 1,170 | 1,170
Level 3 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 3 [Member] | US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 3 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 3 [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member] | Other Government - Sponsored Enterprises [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 3 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | 0
Debt Securities, Available-for-Sale | 0 |
Level 3 [Member] | Corporate Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Estimated Fair Value of Available for Sale |  | $ 0
Debt Securities, Available-for-Sale | $ 0 |

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