Income Taxes - Reconciliation of Federal Statutory Income Tax Provision (Benefit) to Effective Income Tax Provision (Detail) - USD ($) $ in Thousands		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Expected benefit at U.S. federal statutory rate		$ (36,656)	$ (45,564)	$ (81,630)
State income taxes - net of federal benefit		2	(2,863)	(2,681)
Income taxed at foreign rates		20,112	18,406	33,417
Equity-based compensation		4,295	1,125	2,865
Tax reserve for uncertain tax positions		2,382	1,827	19
Change in valuation allowance		14,786	17,526	37,202
Impact of change in tax rates		69	(18)	25
Acquisition costs		110	650	2,981
Contingent consideration		(2,781)
Other		1,123	239	475
Provision for (benefit from) income taxes	$ (10,300)	$ 3,442	$ (8,672)	$ (7,327)