Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Partners Capital [Abstract]
Net income (loss)	$ (41,737)	$ 3,052	$ (72,741)	$ (70,312)
Other comprehensive income (loss):
Change in foreign currency translation adjustment	(6,030)	(16,858)	(54,290)	(12,746)
Net change on unrealized gains (losses) on available-for-sale investments, net of tax	(7)	129	123	507
Other comprehensive income (loss):	(6,037)	(16,729)	(54,167)	(12,239)
Comprehensive income (loss):	$ (47,774)	$ (13,677)	$ (126,908)	$ (82,551)