Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 172,515	$ 164,100
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(6,798)	677
Interest rate swaps – net change in deferred gain or loss	5,370	5,270
Pension plans – net change in deferred actuarial loss	48	103
Other comprehensive (loss) income, net of tax	(1,380)	6,050
Comprehensive income	$ 171,135	$ 170,150