Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 169,078	$ 166,944	$ 168,148
Other comprehensive income (loss):
Foreign currency translation adjustments	(2,867)	1,996	(493)
Change in fair value of interest rate swaps, net of tax	(5,238)	(651)	255
Other comprehensive income (loss)	(8,105)	1,345	(238)
Comprehensive income	$ 160,973	$ 168,289	$ 167,910