CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 60,710	$ 85,166	$ 83,846
Other comprehensive income (loss):
Currency translation adjustment, gross	(38,132)	(28,517)	(1,374)
Tax (expense) benefit	0	0	(3,447)
Comprehensive income	$ 22,578	$ 56,649	$ 79,025