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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, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other investments | $ 44,700 | $ 25,200
Other Investments | 50,871 | 26,414
Loans Held for Sale | 29,820 | 11,869
Other Assets | 59,805 | 68,429
Total Assets | (1,161,482) | (869,373)
Other Liabilities | 58,167 | 89,298
Total Liabilities | 58,167 | 89,298
Debt Securities, Available-for-Sale | 1,020,986 | 762,661
US Government Agencies Debt Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 468,900 |
US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 3,465 | 3,983
US Government Agencies Debt Securities [Member] | Mortgage-Backed Securities-Commercial [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 465,393 | 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 | 494,600 |
Obligations of U.S. Government-Sponsored Enterprises [Member] | Mortgage-Backed Securities-Residential [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 494,599 | 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] |  |
Debt Securities, Available-for-Sale | 915 | 882
Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 8,202 | 8,187
Corporate Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 48,412 | 29,204
Level 1 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
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 | 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] |  |
Debt Securities, Available-for-Sale | 0 | 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] |  |
Debt Securities, Available-for-Sale | 0 | 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] |  |
Debt Securities, Available-for-Sale | 0 | 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] |  |
Debt Securities, Available-for-Sale | 0 | 0
Level 1 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 0 | 0
Level 1 [Member] | Corporate Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other Investments | 44,689 | 25,244
Loans Held for Sale | 29,820 | 11,869
Other Assets | 32,668 | 50,738
Total Assets | (1,128,163) | (850,512)
Other Liabilities | 58,167 | 89,298
Total Liabilities | 58,167 | 89,298
Debt Securities, Available-for-Sale | 1,020,986 | 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] |  |
Debt Securities, Available-for-Sale | 3,465 | 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] |  |
Debt Securities, Available-for-Sale | 465,393 | 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] |  |
Debt Securities, Available-for-Sale | 494,599 | 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] |  |
Debt Securities, Available-for-Sale | 915 | 882
Fair Value, Inputs, Level 2 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 8,202 | 8,187
Fair Value, Inputs, Level 2 [Member] | Corporate Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 48,412 | 29,204
Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Loans Held for Sale | 0 | 0
Other Assets | 27,137 | 17,691
Total Assets | (33,319) | (18,861)
Other Liabilities | 0 | 0
Total Liabilities | 0 | 0
Debt Securities, Available-for-Sale | 0 | 0
Level 3 [Member] | Equity Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other Investments | 6,182 | 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] |  |
Debt Securities, Available-for-Sale | 0 | 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] |  |
Debt Securities, Available-for-Sale | 0 | 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] |  |
Debt Securities, Available-for-Sale | 0 | 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] |  |
Debt Securities, Available-for-Sale | 0 | 0
Level 3 [Member] | Obligations of States and Political Subdivisions [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | 0 | 0
Level 3 [Member] | Corporate Securities [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Securities, Available-for-Sale | $ 0 | $ 0

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