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Income Taxes - Schedule of Income (Loss) Before Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Amount |  |  |  |  |  |  |  |  |  |  |
Federal income tax at statutory rate |  |  |  |  |  |  |  |  | $ 92,654 | $ 39,849 | $ 22,634
State income tax, net of federal benefit |  |  |  |  |  |  |  |  | 16,863 | 9,225 | 5,709
Tax-exempt interest, net of disallowance |  |  |  |  |  |  |  |  | (670) | (492) | (385)
Bank-owned life insurance |  |  |  |  |  |  |  |  | (1,927) | (1,579) | (1,677)
Tax credits, net of basis reduction |  |  |  |  |  |  |  |  | (11,284) | (1,062) | (446)
Equity-based compensation |  |  |  |  |  |  |  |  | (8,237) | 185 | 132
Non-deductible executive compensation |  |  |  |  |  |  |  |  | 3,195 | 454 | 440
Unrecorded basis difference in foreign subsidiaries |  |  |  |  |  |  |  |  | 0 | (304) | (144)
Recorded basis difference in foreign subsidiaries |  |  |  |  |  |  |  |  | (4,217) | 0 | 0
Other |  |  |  |  |  |  |  |  | 563 | 441 | 129
Income tax expense | $ 12,993 | $ 36,263 | $ 20,124 | $ 17,560 | $ 23,447 | $ 12,016 | $ 7,980 | $ 3,274 | $ 86,940 | $ 46,717 | $ 26,392
% of pretax income |  |  |  |  |  |  |  |  |  |  |
Federal income tax at statutory rate |  |  |  |  |  |  |  |  | 21.00% | 21.00% | 21.00%
State income tax, net of federal benefit |  |  |  |  |  |  |  |  | 3.82% | 4.86% | 5.30%
Tax-exempt interest, net of disallowance |  |  |  |  |  |  |  |  | (0.15%) | (0.26%) | (0.36%)
Bank-owned life insurance |  |  |  |  |  |  |  |  | (0.44%) | (0.83%) | (1.56%)
Tax credits, net of basis reduction |  |  |  |  |  |  |  |  | (2.92%) | (0.61%) | (0.41%)
Equity-based compensation |  |  |  |  |  |  |  |  | (1.87%) | 0.10% | 0.12%
Non-deductible executive compensation |  |  |  |  |  |  |  |  | 0.72% | 0.24% | 0.41%
Unrecorded basis difference in foreign subsidiaries |  |  |  |  |  |  |  |  | 0.00% | (0.16%) | (0.13%)
Recorded basis difference in foreign subsidiaries |  |  |  |  |  |  |  |  | (1.00%) | 0.00% | 0.00%
Other |  |  |  |  |  |  |  |  | 0.54% | 0.28% | 0.12%
Effective income tax rate |  |  |  |  |  |  |  |  | 19.70% | 24.62% | 24.49%

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