Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 55,607	$ 9,492
Effective tax rates	14.00%	3.00%
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 52,000		$ 48,000
Reduction in provision for income taxes due to impact of effective tax rate	49,000
Deferred tax assets classified as other non-current assets	557,000		564,000
Deferred tax assets, valuation allowance	139,000		$ 125,000
Other noncurrent liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits	17,000
Other noncurrent assets
Income Tax Contingency [Line Items]
Unrecognized tax benefits	35,000
Accounting Standards Update 2016-09
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation, share-based compensation, excess tax benefit	$ 41,000	$ 61,000