Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 5,494	$ 11,419	$ 2,101	$ 16,658
Other comprehensive income (loss)
Foreign currency translation adjustment	1,917	2,125	6,832	(20,885)
Comprehensive income (loss)	$ 7,411	$ 13,544	$ 8,933	$ (4,227)