Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net income	$ 43,002	$ 35,539
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of taxes of $(145) and $854 for the three months ended March 31, 2019 and 2018, respectively	4,140	11,047
Net unrealized gains/(losses) on foreign currency cash flow hedges, net of taxes of zero and $28 for the three months ended March 31, 2019 and 2018, respectively	0	(247)
Reclassification adjustment for realized losses/(gains) in current earnings, net of taxes of zero and $(5) for the three months ended March 31, 2019 and 2018, respectively	0	44
Total other comprehensive income	4,140	10,844
Comprehensive income	$ 47,142	$ 46,383