Consolidated Statements of Shareholders' Equity and Comprehensive Income (USD $) In Thousands, unless otherwise specified	Total	Common Stock Issued [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Fair Value of Hedging Instruments Adjustment [Member]	Accumulated Translation Adjustment [Member]	Accumulated Defined Benefit Plans Adjustment [Member]
Balance at Dec. 31, 2009	$ 1,224,323	$ 27,709	$ 198,933	$ (27,796)	$ 1,039,043	$ (2,428)	$ (7,156)	$ (3,982)
Balance, shares at Dec. 31, 2009		110,834
Stockholders' Equity [Roll Forward]
Net Income	200,531				200,531
Other Comprehensive Income	4,606					2,428	1,893	285
Restricted stock unit activity	7,841		(4,027)	11,868
Restricted stock activity	0		(1,781)	1,781
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	1,741
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	800
Stock options exercised	693		(1,589)	2,282
Tax benefits from stock plans	1,741		1,741
Cash dividends	0
Treasury stock purchases	(49,520)			(49,520)
Balance at Dec. 31, 2010	1,390,215	27,709	193,277	(61,385)	1,239,574	0	(5,263)	(3,697)
Balance, shares at Dec. 31, 2010		110,834
Stockholders' Equity [Roll Forward]
Net Income	235,658				235,658
Other Comprehensive Income	(18,231)					0	(18,374)	143
Restricted stock unit activity	15,199		9,532	5,667
Restricted stock activity	0		(1,509)	1,509
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	1,320
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	1,300		1,319
Tax benefits from stock plans	1,319
Cash dividends	48,707				(48,707)
Treasury stock purchases	(17,491)			(17,491)
Balance at Dec. 31, 2011	1,557,962	27,709	202,619	(71,700)	1,426,525	0	(23,637)	(3,554)
Balance, shares at Dec. 31, 2011		110,834
Stockholders' Equity [Roll Forward]
Net Income	289,017				289,017
Other Comprehensive Income	45,037						44,775	262
Restricted stock unit activity	14,842
Restricted stock activity	0		(1,139)	1,139
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	2,475		2,475
Tax benefits from stock plans	2,475
Cash dividends	74,515				(74,515)
Treasury stock purchases	(19,358)			(19,358)
Balance at Dec. 31, 2012	$ 1,815,460	$ 27,709	$ 212,940	$ (84,062)	$ 1,641,027	$ 0	$ 21,138	$ (3,292)
Balance, shares at Dec. 31, 2012		110,834