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Income Taxes Income Taxes - Provision for (Benefit from) Income Taxes (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Federal      
Current $ 35,788 $ 91,214 $ 40,235
Deferred (5,989) 15,724 24,794
Total federal income tax expense 29,799 106,938 65,029
State      
Current 9,568 2,580 2,603
Deferred (3,274) 2,677 2,636
Total state tax expense 6,294 5,257 5,239
Foreign      
Current 22,753 15,285 8,964
Deferred (1,123) 2,682 (28,032)
Total foreign tax expense 21,630 17,967 (19,068)
Provision for income taxes $ 57,723 $ 130,162 $ 51,200