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Income Taxes - (Benefit) Provision for Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Current: |  |  |
U.S. Federal | $ 21,171 | $ 17,203 | $ 7,976
State | 2,976 | 2,049 | 1,851
Foreign | 2,016 | 1,683 | 1,645
Current income tax expense (benefit) | 26,163 | 20,935 | 11,472
Deferred: |  |  |
U.S. Federal | (103,518) | 4,005 | 13,201
State | 6,948 | 3,039 | 1,538
Foreign | (61) | 701 | (304)
Deferred income tax expense (benefit) | (96,631) | 7,745 | 14,435
Total | $ (70,468) | $ 28,680 | $ 25,907

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