Condensed Consolidated Statements Of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock Cumulative-effect adjustments upon adoption of ASU	Common Stock	Retained Earnings Cumulative-effect adjustments upon adoption of ASU	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Cumulative-effect adjustments upon adoption of ASU	Total
Balance, beginning of period (Accounting Standards Update 2016-13) at Dec. 31, 2019			$ (620)			$ (620)
Balance, beginning of period at Dec. 31, 2019		$ 1,318,961		$ 445,370	$ (64,740)		$ 1,699,591
Balance, beginning of period (in shares) at Dec. 31, 2019		148,888
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss				(11,938)			(11,938)
Foreign currency translation adjustments					(33,587)		(33,587)
Unrealized gain on hedges, net of tax					265		265
Accretion of redeemable noncontrolling interests				(2,086)			(2,086)
Activity in company stock plans, net and other		$ (4,730)					(4,730)
Activity in company stock plans, net and other (in shares)		1,074
Share-based compensation		$ 2,170					2,170
Balance, end of period at Mar. 31, 2020		$ 1,316,401		430,726	(98,062)		1,649,065
Balance, end of period (in shares) at Mar. 31, 2020		149,962
Balance, beginning of period at Dec. 31, 2019							3,455
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net loss							(1,990)
Foreign currency translation adjustments related to redeemable noncontrolling interests							(228)
Accretion of redeemable noncontrolling interests							2,086
Balance, end of period at Mar. 31, 2020							3,323
Balance, beginning of period (Accounting Standards Update 2020-06) at Dec. 31, 2020	$ (41,456)		$ 6,682			$ (34,774)
Balance, beginning of period at Dec. 31, 2020		$ 1,327,592		464,524	(51,620)		1,740,496
Balance, beginning of period (in shares) at Dec. 31, 2020		150,341
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss				(2,878)			(2,878)
Foreign currency translation adjustments					4,613		4,613
Accretion of redeemable noncontrolling interests				(241)			(241)
Activity in company stock plans, net and other		$ (1,600)					(1,600)
Activity in company stock plans, net and other (in shares)		374
Share-based compensation		$ 1,844					1,844
Balance, end of period at Mar. 31, 2021		$ 1,286,380		$ 468,087	$ (47,007)		1,707,460
Balance, end of period (in shares) at Mar. 31, 2021		150,715
Balance, beginning of period at Dec. 31, 2020							3,855
Increase (Decrease) in Redeemable Noncontrolling Interests [Roll Forward]
Net loss							(172)
Foreign currency translation adjustments related to redeemable noncontrolling interests							36
Accretion of redeemable noncontrolling interests							241
Balance, end of period at Mar. 31, 2021							$ 3,960