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Income Taxes - Reconciliation of Statutory Income Tax Rate to Consolidated Effective Income Tax Rate (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |  |
Federal income tax at statutory rate, rate | 21.00% | 21.00% | 21.00%
State franchise taxes, net of federal benefit, rate | 8.00% | 8.30% | 8.30%
State impact of BOLI surrender, net of federal benefit, rate | 0.50% | 0.00% | 0.00%
Federal impact of BOLI surrender and MEC penalty, Rate | 1.70% | 0.00% | 0.00%
Tax-exempt income, rate | (1.60%) | (1.00%) | (1.10%)
Tax credits, rate | (0.40%) | (0.50%) | (0.60%)
Other, net, rate | 0.60% | 0.50% | 1.00%
Provision for income taxes, rate | 29.80% | 28.30% | 28.60%
Federal income tax at statutory rate | $ 66,241 | $ 68,953 | $ 62,506
State franchise taxes, net of federal benefit | 25,139 | 27,256 | 24,600
State impact of BOLI surrender, net of federal benefit | 1,489 | 0 | 0
Federal impact of BOLI surrender and MEC penalty | 5,486 | 0 | 0
Tax-exempt income | (5,146) | (3,290) | (3,165)
Tax credits | (1,239) | (1,617) | (1,640)
Other, net | 2,029 | 1,620 | 2,826
Provision for income taxes | $ 93,999 | $ 92,922 | $ 85,127

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