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
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net income	$ 56,872	$ 16,267	$ 104,901	$ 97,206
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of taxes of $(760) and $2,787 for the three months ended September 30, 2016 and 2015, respectively, and $(2,324) and $(3,036) for the nine months ended September 30, 2016 and 2015, respectively	2,463	(9,629)	4,413	(20,355)
Net unrealized gains/(losses) on foreign currency cash flow hedges, net of taxes of $147 and $61 for the three months ended September 30, 2016 and 2015, respectively, and $1,722 and $(109) for the nine months ended September 30, 2016 and 2015, respectively	(266)	(110)	(3,126)	199
Reclassification adjustment for realized losses/(gains) in current earnings, net of taxes of $(409) and $5 for the three months ended September 30, 2016 and 2015, respectively, and $(803) and $729 for the nine months ended September 30, 2016 and 2015, respectively	743	(10)	1,459	(1,323)
Total other comprehensive income	2,940	(9,749)	2,746	(21,479)
Comprehensive Income	$ 59,812	$ 6,518	$ 107,647	$ 75,727