Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
COMPREHENSIVE INCOME:
Net income	$ 117,181	$ 115,242	$ 341,591	$ 320,724
Foreign currency translation adjustments, net of tax	(10,011)	(3,383)	(9,762)	(13,299)
Total comprehensive income	$ 107,170	$ 111,859	$ 331,829	$ 307,425