Condensed Consolidated Statements of Comprehensive Loss(Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (10,500)	$ (59,411)
Unrealized net gain (loss) from cash flow hedging instruments	295	(2,860)
Realization of cash flow hedging net (gain) loss upon settlement	(231)	358
Reclassification of unrealized gain from ineffective cash flow hedging instruments	(22)
Foreign currency translation adjustments	(2,166)	(1,111)
Defined benefit and postretirement benefit plans	48	13
Other comprehensive loss, before tax	(2,076)	(3,600)
Income tax (expense) benefit related to other comprehensive loss	(24)	695
Other comprehensive loss, net of tax	(2,100)	(2,905)
Comprehensive loss	(12,600)	(62,316)
Comprehensive (income) loss attributable to non-controlling interests	(3,687)	10,393
Comprehensive loss attributable to common shareholders	$ (16,287)	$ (51,923)