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Income Taxes - Schedule of Income Tax Expense (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Current provision:      
Federal $ 48,328 $ 51,564 $ 31,055
State 28,469 29,487 20,546
Current provision, total 76,797 81,051 51,601
Deferred provision      
Federal (2,997) 486 5,158
State (1,439) 1,710 2,353
Deferred provision (benefit), total (4,436) 2,196 7,511
Provision for income taxes $ 72,361 $ 83,247 $ 59,112