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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (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
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%