Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 882,466	$ 807,799	$ 793,560
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	11,677	(39,679)	(6,621)
Interest rate swaps - net change in deferred gain or loss	15,086	17,075	21,781
Pension plans - net change in deferred actuarial gain or loss	(1,484)	2,425	2,637
Other comprehensive income (loss), net for the year	25,279	(20,179)	17,797
Comprehensive income	$ 907,745	$ 787,620	$ 811,357