Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
COMPREHENSIVE INCOME:
Net income	$ 114,612	$ 109,315	$ 224,410	$ 205,482
Foreign currency translation adjustments, net of tax		(15,424)	249	(9,916)
Total comprehensive income	$ 116,758	$ 93,891	$ 224,659	$ 195,566