UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 115,766	$ 148,157	$ 188,167	$ 193,471
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale securities	44	(128)	218	(656)
Unrealized gain on fair value of interest rate hedges	12,556	11,243	7,727	35,924
Reclassification adjustment for interest rate hedge amounts realized in net income	(4,930)	2,164	(9,054)	5,358
Reclassification adjustment for settlement of interest rate hedges	0	0	(5,905)	0
Unfunded pension liability	(7)	20	(7)	10
Foreign currency translation adjustments	7,898	(13,838)	8,236	(7,326)
Other comprehensive income (loss), net of tax	15,561	(539)	1,215	33,310
Comprehensive income	$ 131,327	$ 147,618	$ 189,382	$ 226,781