Consolidated Statements of Stockholders Equity Statement - USD ($) shares in Thousands, $ in Thousands		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Noncontrolling Interest [Member]	Retained Earnings [Member]	Treasury Stock, Common	AOCI Attributable to Parent
Shares, Outstanding			50,500
Total stockholders' equity		$ 1,049,987	$ 1,033	$ 421,609	$ 14,827	$ 2,643,629	$ (1,895,143)	$ (135,968)
Treasury Stock, at Average Cost (in shares)							52,800
Income (Loss) Attributable to Noncontrolling Interest, before Tax					3,439
Net Income (Loss) Attributable to Parent		247,018				247,018
Net income		250,457
Treasury Stock, Shares, Acquired			203				203
Treasury Stock, Value, Acquired, Cost Method		(30,000)					$ (30,000)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			772				(772)
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture		(67,225)		(33,912)		(12,678)	$ (20,635)
Share-based compensation expense		(20,596)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(627)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		1,604
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(3,642)			(3,642)
Shares, Outstanding			51,102
Total stockholders' equity		1,091,170	$ 1,033	400,807	12,284	2,745,382	$ (1,931,054)	(137,282)
Treasury Stock, at Average Cost (in shares)							52,198
Income (Loss) Attributable to Noncontrolling Interest, before Tax					2,211
Net Income (Loss) Attributable to Parent		133,168				133,168
Net income		135,379
Treasury Stock, Shares, Acquired			84				84
Treasury Stock, Value, Acquired, Cost Method		(15,000)					$ (15,000)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			51				(51)
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture		2,052		(1,747)		(581)	$ (276)
Share-based compensation expense		(9,233)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(1,150)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		3,441
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		129			129
Shares, Outstanding			51,069
Total stockholders' equity		1,221,150	$ 1,033	408,293	14,624	2,877,969	$ (1,945,778)	(134,991)
Treasury Stock, at Average Cost (in shares)							52,231
Shares, Outstanding			49,735
Total stockholders' equity		1,351,323	$ 1,033	422,912	15,695	3,196,724	$ (2,145,890)	(139,151)
Treasury Stock, at Average Cost (in shares)							53,565
Income (Loss) Attributable to Noncontrolling Interest, before Tax					3,331
Net Income (Loss) Attributable to Parent		221,796				221,796
Net income		225,127
Treasury Stock, Shares, Acquired	[1]		3,248				3,248
Treasury Stock, Value, Acquired, Cost Method	[1]	(252,046)					$ (252,046)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			580				(580)
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture		(34,830)		(38,413)		(4,487)	$ 8,070
Share-based compensation expense		(20,384)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(11,492)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		12,815
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(4,077)			(4,077)
Shares, Outstanding			47,643
Total stockholders' equity		1,202,594	$ 1,033	396,750	13,468	3,272,657	$ (2,340,285)	(141,029)
Treasury Stock, at Average Cost (in shares)							55,657
Income (Loss) Attributable to Noncontrolling Interest, before Tax					2,005
Net Income (Loss) Attributable to Parent		141,383				141,383
Net income		143,388
Treasury Stock, Shares, Acquired	[2]		599				599
Treasury Stock, Value, Acquired, Cost Method	[2]	(50,480)					$ (50,480)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			23				23
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture		768		(1,660)		(7)	$ 899
Share-based compensation expense		(9,793)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		1,048
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		2,153
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(524)			(524)
Shares, Outstanding			47,067
Total stockholders' equity		$ 1,307,204	$ 1,033	$ 404,883	$ 14,949	$ 3,414,033	$ (2,389,866)	$ (137,828)
Treasury Stock, at Average Cost (in shares)							56,233

[1] (1)Includes commissions and excise tax on share repurchases

[2] (1)Includes commissions and excise tax on share repurchases