Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Effective income tax rate reconciliation, at federal statutory income tax rate, percent		21.00%	21.00%	35.00%
Net income tax benefit		$ 0	$ 0	$ (13,894)
Deferred income tax benefit from change in tax rate	$ 116,200
Income tax benefit from lower foreign tax rates		26,599	16,445	(25,374)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount		15,700	20,300
Income tax refunds received		4,000	4,000
Tax Cuts and Jobs Act - Provisional
Income Taxes [Line Items]
Net income tax benefit	(13,900)
Deferred tax asset reversal, foreign income tax credits	70,200
Current income tax expense, mandatory tax on undistributed earnings	$ 32,100
Income tax benefit from lower foreign tax rates				$ 25,400
Tax Cut and Jobs Act Adjustment
Income Taxes [Line Items]
Deferred tax asset reversal, foreign income tax credits			3,600
Current income tax expense, mandatory tax on undistributed earnings			1,000
Foreign Derived Intangible Income (FDII)
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount		$ 9,000	$ 4,800