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Recent Developments Including Mergers and Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Jun. 17, 2021
--- | --- | --- | ---
Business Combination Separately Recognized Transactions [Line Items] |  |  |
Total assets | $ 12,602,425 | $ 12,372,042 |
Loans held for investment (net of unearned interest) | 7,781,860 | 7,656,645 |
Deposits | 10,909,621 | 10,700,122 |
Goodwill | $ 182,263 | $ 182,263 |
Subordinated Notes due 2036 [Member] | Private Placement [Member] |  |  |
Business Combination Separately Recognized Transactions [Line Items] |  |  |
Aggregate principal amount |  |  | $ 60,000
Fixed-to-floating rate |  |  | 3.50%

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