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Income Taxes - Components of Income Tax Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Current                      
Federal                 $ 29,478 $ 2,973 $ 4,509
State                 10,220 5,304 5,547
Total deferred expense                 39,698 8,277 10,056
Deferred                      
Federal                 2,880 13,175 9,702
State                 802 1,341 (399)
Total deferred expense                 3,682 14,516 9,303
Income tax expense $ 22,225 $ 12,201 $ 7,048 $ 1,906 $ 7,451 $ 8,020 $ 2,491 $ 4,831 $ 43,380 $ 22,793 $ 19,359