Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 23,957	$ 20,232	$ 69,351	$ 57,604
Other comprehensive income (loss):
Foreign currency translation adjustments	(548)	(10,129)	(1,013)	(14,163)
Total other comprehensive income (loss)	(548)	(10,129)	(1,013)	(14,163)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	23,409	10,103	68,338	43,441
Net Income (Loss) Attributable to Noncontrolling Interest	(110)	0	133	0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 23,519	$ 10,103	$ 68,205	$ 43,441