Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 75,097	$ 20,795
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(46,381)	(7,236)
Interest rate swaps – net change in deferred gain or loss	(44,732)	(14,505)
Pension plans – net change in deferred actuarial loss	79	42
Other comprehensive loss, net of tax	(91,034)	(21,699)
Comprehensive loss	$ (15,937)	$ (904)