CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Comprehensive Income (Loss)
Net Income	$ 47,662	$ 43,787	$ 120,468	$ 102,286
Other comprehensive income, net of tax:
Foreign currency translation	(87)	86	(24)	181
Reclassification of net losses on derivative instruments	113	113	225	226
Total Other Comprehensive Income	26	199	201	407
Comprehensive Income	$ 47,688	$ 43,986	$ 120,669	$ 102,693