CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 203,247	$ 134,837	$ 97,740
Other comprehensive income (loss), net of tax:
Unrealized loss on available-for-sale securities	(285)	(8)	(120)
Reclassification adjustment for loss on available-for-sale securities included in net income	0	0	332
Unrealized gain (loss) on interest rate hedge	6,235	(20,970)	(14,401)
Reclassification adjustment for loss on interest rate hedge included in net income	10,011	8,180	2,335
Unrealized gain (loss) on net pension liability	1,094	(189)	44
Foreign currency translation adjustments	(1,590)	11,561	25,130
Other comprehensive income (loss), net of tax	15,465	(1,426)	13,320
Comprehensive income	$ 218,712	$ 133,411	$ 111,060