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Components of Income Tax Expense (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Current:      
U.S. Federal $ 48,359 $ 47,263 $ 82,333
State 9,362 10,031 12,162
Foreign 8,078 7,229 6,461
Current 65,799 64,523 100,956
Deferred:      
U.S. Federal 2,603 7,082 (13,254)
State 446 1,600 (1,519)
Foreign (1,771) (392) 4,038
Deferred 1,278 8,290 (10,735)
Income tax expense $ 67,077 $ 72,813 $ 90,221