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					5,324
Net Income (Loss) Attributable to Parent		378,997				378,997
Net income		384,321
Treasury Stock, Shares, Acquired			923				923
Treasury Stock, Value, Acquired, Cost Method		(130,056)					$ (130,056)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			794				(794)
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture		(69,613)		(35,092)		(12,962)	$ (21,559)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition		30,123		30,123
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		834
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		1,688
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(6,824)			(6,824)
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
Income (Loss) Attributable to Noncontrolling Interest, before Tax					1,885
Net Income (Loss) Attributable to Parent		131,979				131,979
Net income		133,864
Treasury Stock, Shares, Acquired			720				720
Treasury Stock, Value, Acquired, Cost Method		(100,056)					$ (100,056)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			22				(22)
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture		2,388		(1,180)		(284)	$ 924
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition		9,527		9,527
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		1,461
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		84
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(3,182)			(3,182)
Shares, Outstanding			50,371
Total stockholders' equity		1,260,460	$ 1,033	416,640	13,327	3,009,664	$ (2,046,758)	(133,446)
Treasury Stock, at Average Cost (in shares)							52,929
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					5,436
Net Income (Loss) Attributable to Parent		334,791				334,791
Net income		340,227
Treasury Stock, Shares, Acquired	[1]		4,498				4,498
Treasury Stock, Value, Acquired, Cost Method	[1]	(353,007)					$ (353,007)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			619				(619)
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture		(36,181)		(39,590)		(5,608)	$ 9,017
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition		29,491		29,491
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		(6,074)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		12,195
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(6,564)			(6,564)
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
Income (Loss) Attributable to Noncontrolling Interest, before Tax					2,105
Net Income (Loss) Attributable to Parent		112,995				112,995
Net income		115,100
Treasury Stock, Shares, Acquired	[2]		1,250				1,250
Treasury Stock, Value, Acquired, Cost Method	[2]	(100,961)					$ (100,961)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture			39				39
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture		1,351		(1,177)		(1,121)	$ 947
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition		9,107		9,107
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		5,418
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(620)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		(2,487)			(2,487)
Shares, Outstanding			45,856
Total stockholders' equity		$ 1,331,410	$ 1,033	$ 412,813	$ 14,567	$ 3,525,907	$ (2,489,880)	$ (133,030)
Treasury Stock, at Average Cost (in shares)							57,444

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

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