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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | $ (7,670) | $ (21,859) | $ (8,025)
State |  |  |  |  |  |  |  |  | 356 | (3,938) | 460
Foreign |  |  |  |  |  |  |  |  | 11,132 | 9,550 | 5,099
Current Income tax expense (benefit) |  |  |  |  |  |  |  |  | 3,818 | (16,247) | (2,466)
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 23,991 | 27,289 | (22,054)
State |  |  |  |  |  |  |  |  | 319 | 702 | 4,701
Foreign |  |  |  |  |  |  |  |  | (4,252) | 2,719 | (2,806)
Provision for (reversal of) valuation allowance on deferred tax assets |  |  |  |  |  |  |  |  | (23,347) | (29,979) | 15,639
Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  | (3,289) | 731 | (4,520)
Total | $ (4,012) | $ 845 | $ 1,348 | $ 2,348 | $ (51) | $ (20,418) | $ 2,828 | $ 2,125 | $ 529 | $ (15,516) | $ (6,986)

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