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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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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
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income tax reconciliation, income tax expense (benefit), at federal statutory income tax rate |  |  |  |  |  |  |  |  | $ 87,378 | $ 132,832 | $ 118,158
Income tax rate reconciliation, foreign income tax rate differential amount |  |  |  |  |  |  |  |  | 4,474 | (6,668) | (5,665)
Income tax rate reconciliation, excess tax benefits recognized on share-based compensation |  |  |  |  |  |  |  |  | (3,885) | (6,051) |
Income tax reconciliation, transition impact of the Tax Reform Act |  |  |  |  |  |  |  |  | (2,737) | (95,457) |
Income tax rate reconciliation, recognition of foreign tax credits |  |  |  |  |  |  |  |  | (6,069) | (40,386) |
Income tax rate reconciliation, change in valuation allowance on foreign tax credits |  |  |  |  |  |  |  |  | 6,069 | 40,386 |
Income tax reconciliation, other reconciling items |  |  |  |  |  |  |  |  | 6,760 | 4,609 | 5,688
Income tax expense (benefit) | $ 21,381 | $ 26,296 | $ 27,065 | $ 17,248 | $ (60,354) | $ 33,565 | $ 33,282 | $ 22,772 | $ 91,990 | $ 29,265 | $ 118,181
Effective income tax rate reconciliation, at federal statutory income tax rate |  |  |  |  |  |  |  |  | 21.00% | 35.00% | 35.00%
Effective income tax rate reconciliation, foreign income tax rate differential |  |  |  |  |  |  |  |  | 1.10% | (1.80%) | (1.70%)
Effective income tax rate reconciliation, excess tax benefits recognized on share-based compensation |  |  |  |  |  |  |  |  | (0.90%) | (1.60%) |
Effective income tax rate reconciliation, transition impact of the Tax Reform Act |  |  |  |  |  |  |  |  | (0.70%) | (25.10%) |
Effective income tax rate reconciliation, recognition of foreign tax credits |  |  |  |  |  |  |  |  | (1.50%) | (10.60%) |
Effective income tax rate reconciliation, change in valuation allowance on foreign tax credits |  |  |  |  |  |  |  |  | 1.50% | 10.60% |
Effective income tax rate reconciliation, other adjustments |  |  |  |  |  |  |  |  | 1.60% | 1.20% | 1.70%
Effective income tax rate |  |  |  |  |  |  |  |  | 22.10% | 7.70% | 35.00%

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