Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Issued [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Foreign Currency Adjustment Attributable to Parent [Member]	Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance, shares at Dec. 31, 2013		110,834
Common Stock, Value, Issued at Dec. 31, 2013		$ 27,709
Additional Paid in Capital at Dec. 31, 2013			$ 222,402
Treasury Stock, Carrying Basis at Dec. 31, 2013				$ (75,736)
Retained Earnings at Dec. 31, 2013					$ 1,921,642
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax at Dec. 31, 2013						$ (50,144)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax at Dec. 31, 2013							$ (2,433)
Balance at Dec. 31, 2013	$ 2,043,440
Stockholders' Equity [Roll Forward]
Net Income	428,329				428,329
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(128,666)					(128,666)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(1,947)						(1,947)
Other Comprehensive Income	(130,613)
Restricted stock unit activity	12,509		4,311	8,198
Restricted stock activity	0		(1,005)	1,005
Tax benefits from stock plans	3,932		3,932
Cash dividends	(109,742)				(109,742)
Treasury Stock, Value, Acquired, Cost Method	(590,384)			(590,384)
Balance, shares at Dec. 31, 2014		110,834
Common Stock, Value, Issued at Dec. 31, 2014		$ 27,709
Additional Paid in Capital at Dec. 31, 2014			229,640
Treasury Stock, Carrying Basis at Dec. 31, 2014				(656,917)
Retained Earnings at Dec. 31, 2014					2,240,229
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax at Dec. 31, 2014						(178,810)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax at Dec. 31, 2014							(4,380)
Balance at Dec. 31, 2014	1,657,471
Stockholders' Equity [Roll Forward]
Net Income	231,011				231,011
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(118,705)					(118,705)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	1,532						1,532
Other Comprehensive Income	(117,173)
Restricted stock unit activity	14,091		2,163	11,928
Restricted stock activity	0		(1,871)	1,871
Tax benefits from stock plans	247		247
Cash dividends	(106,454)				(106,454)
Treasury Stock, Value, Acquired, Cost Method	(100,459)			(100,459)
Balance, shares at Dec. 31, 2015		110,834
Common Stock, Value, Issued at Dec. 31, 2015	27,709	$ 27,709
Additional Paid in Capital at Dec. 31, 2015			230,179
Treasury Stock, Carrying Basis at Dec. 31, 2015				(743,577)
Retained Earnings at Dec. 31, 2015	2,364,786				2,364,786
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax at Dec. 31, 2015						(297,515)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax at Dec. 31, 2015							(2,848)
Balance at Dec. 31, 2015	1,578,734
Stockholders' Equity [Roll Forward]
Net Income	24,586				24,586
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(5,559)					(5,559)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	3,258						3,258
Other Comprehensive Income	(2,301)
Restricted stock unit activity	12,766		2,338	10,428
Restricted stock activity	0		(1,947)	1,947
Tax benefits from stock plans	(3,004)		(3,004)
Cash dividends	(94,138)				(94,138)
Balance, shares at Dec. 31, 2016		110,834
Common Stock, Value, Issued at Dec. 31, 2016	27,709	$ 27,709
Additional Paid in Capital at Dec. 31, 2016			$ 227,566
Treasury Stock, Carrying Basis at Dec. 31, 2016				$ (731,202)
Retained Earnings at Dec. 31, 2016	2,295,234				$ 2,295,234
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax at Dec. 31, 2016						$ (303,074)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax at Dec. 31, 2016							$ 410
Balance at Dec. 31, 2016	$ 1,516,643