Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Discrete tax expense related to Tax Cuts and Jobs Act of 2017	$ 450,500	$ 450,500
Increase of effective income tax rate		44.40%
Effective income tax rate		75.10%	38.60%	30.80%
Discrete tax expense related to revaluation of deferred tax asset	415,000	$ 415,000	$ 0	$ 0
Discrete tax expense related to deemed repatriation of foreign earnings	35,500	35,500	0	0
Tax benefit from repatriation of foreign earnings		31,900
Increase of income taxes provision		161	24,907	0
Net interest expense related to unrecognized tax benefits		9,700	8,600	$ 4,200
Interest accrued related to unrecognized tax benefits	57,400	57,400	47,700
Expected decrease in unrecognized tax benefit related to uncertain tax position over next 12 months		14,000
Valuation allowance	93,758	93,758	106,042
Undistributed earnings of foreign subsidiaries			157,000
Deferred tax liability not recorded on earnings of foreign subsidiaries permanently invested abroad			$ 55,000
Subsidiary [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1,200,000	1,200,000
Consolidated Tax Group [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1,200,000	1,200,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	68,600	68,600
Valuation allowance	$ 10,000	$ 10,000