Income Taxes - Schedule of Statutory Federal Income Tax Rate to Income from Continuing Operations Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income tax expense at the federal statutory rate of 35%	$ 96,810	$ 324,087	$ 162,624
Foreign tax rate differential	(66,947)	(162,784)	(81,371)
Unrecognized tax benefits and related interest	33,170	33,362	(1,625)
Change in valuation allowance	(13,924)	27,320	13,914
Return to provision true-ups	(14,420)	(8,875)	(4,472)
Pay-to-play penalties	0	(11,222)	1,322
Acquisition related costs	1,611	12,545	56
Federal research and development credit	(15,000)	(11,500)	(6,000)
trivago stock-based-compensation	16,956	0	0
Excess tax benefits related to stock-based compensation	(39,751)	0	0
Other, net	16,810	281	7,243
Income tax expense	$ 15,315	$ 203,214	$ 91,691