Consolidated Statements Of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Loss
Balance, beginning of year at Dec. 31, 2016	$ 1,281,814	$ 1,055,934	$ 322,854	$ (96,974)
Balance, beginning of year (in shares) at Dec. 31, 2016		120,630
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	30,052		30,052
Foreign currency translation adjustments	16,264			16,264
Unrealized gain on hedges, net of tax	10,514			10,514
Unrealized gain (loss) on note receivable, net of tax	409			409
Equity component of debt discount on convertible senior notes	(7)	$ (7)
Accretion of redeemable noncontrolling interests	0
Issuance of common stock, net of transaction costs	219,504	$ 219,504
Issuance of common stock, net of transaction costs (in shares)		26,450
Activity in company stock plans, net and other	(1,887)	$ (1,887)
Activity in company stock plans, net and other (in shares)		660
Share-based compensation	10,730	$ 10,730
Balance, end of year at Dec. 31, 2017	1,567,393	$ 1,284,274	352,906	(69,787)
Balance, end of year (in shares) at Dec. 31, 2017		147,740
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	28,598		28,598
Reclassification of stranded tax effect to retained earnings			1,530	(1,530)
Foreign currency translation adjustments	(7,166)			(7,166)
Unrealized gain on hedges, net of tax	5,016			5,016
Unrealized gain (loss) on note receivable, net of tax	(497)			(497)
Equity component of debt discount on convertible senior notes	15,411	$ 15,411
Accretion of redeemable noncontrolling interests	0
Activity in company stock plans, net and other	(746)	$ (746)
Activity in company stock plans, net and other (in shares)		463
Share-based compensation	9,770	$ 9,770
Balance, end of year at Dec. 31, 2018	1,617,779	$ 1,308,709	383,034	(73,964)
Balance, end of year (in shares) at Dec. 31, 2018		148,203
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	57,919		57,919
Reclassification of deferred gain from sale leaseback transaction to retained earnings	4,560		4,560
Foreign currency translation adjustments	5,400			5,400
Unrealized gain on hedges, net of tax	3,824			3,824
Unrealized gain (loss) on note receivable, net of tax	0
Accretion of redeemable noncontrolling interests	(143)		(143)
Activity in company stock plans, net and other	(1,032)	$ (1,032)
Activity in company stock plans, net and other (in shares)		685
Share-based compensation	11,284	$ 11,284
Balance, end of year at Dec. 31, 2019	$ 1,699,591	$ 1,318,961	$ 445,370	$ (64,740)
Balance, end of year (in shares) at Dec. 31, 2019		148,888