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Income Taxes - Reconciliation of Tax Expense at the Federal Statutory Tax Rate (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |
Tax expense at the federal statutory tax rate | $ 49,861 | $ 43,764 | $ 25,937
Increase (decrease) in tax expense from: |  |  |
Tax-exempt income, net | (337) | (436) | (507)
Modified endowment life contracts | (487) | (501) | (508)
Share based compensation excess tax benefit | (2,905) | (1,643) | (412)
Tax deductible dividends paid on ESOP | (481) | (490) | (453)
State tax expense, net of federal tax benefit | 3,788 | 4,779 | 5,606
Bargain purchase gain |  | (1,007) |
Utilization of tax credits: |  |  |
New markets tax credits, net of tax expense | (3,745) | (3,192) | (3,121)
Low-income housing tax credits, net of amortization | (1,024) | (1,533) | (1,273)
Other tax credits | (91) | (379) | (320)
Other, net | (247) | 1,406 | (1,023)
Total income taxes | $ 44,332 | $ 40,768 | $ 23,926

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