Condensed Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (13,683)	$ 5,450	$ (16,733)	$ (8,478)
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on hedges arising during the period		1		(95)
Reclassifications into earnings		25		452
Income taxes on hedges		(6)		(72)
Net change in hedges, net of tax		20		285
Foreign currency translation gain (loss)	2,356	(1,896)	6,969	(35,483)
Other comprehensive income (loss), net of tax	2,356	(1,876)	6,969	(35,198)
Comprehensive income (loss)	(11,327)	3,574	(9,764)	(43,676)
Less comprehensive income (loss) attributable to redeemable noncontrolling interests:
Net income (loss)	26		(146)	(1,990)
Foreign currency translation gain (loss)	12	(20)	48	(248)
Comprehensive income (loss) attributable to redeemable noncontrolling interests	38	(20)	(98)	(2,238)
Comprehensive income (loss) attributable to common shareholders	$ (11,365)	$ 3,594	$ (9,666)	$ (41,438)