CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Shares	Noncontrolling Interests
Beginning Balance at Dec. 31, 2010	$ 1,149,478	$ 9,858	$ 162,447	$ 1,320,552	$ (141,948)	$ (217,412)	$ 15,981
Beginning Balance (in shares) at Dec. 31, 2010		84,242,000
Increase (Decrease) in Stockholders' Equity
Net income	217,013			217,186			(173)
Unrecognized amounts from defined benefit pension plans, net of tax	(79,936)				(79,936)
Unrealized gain on derivatives designated and qualifying as cash flow hedges, net of tax	1,264				1,264
Currency translation adjustment	(26,773)				(27,261)		488
Cash dividends declared - $0.83, $0.710, and $0.635 per share during the year 2013, 2012 and 2011, respectively	(53,345)			(53,345)
Issuance of shares under benefit plans	22,538		16,657			5,881
Issuance of shares under benefit plans (in shares)		593,000
Purchase of shares for treasury	(36,997)					(36,997)
Purchase of shares for treasury (in shares)		(1,078,000)
Ending Balance at Dec. 31, 2011	1,193,242	9,858	179,104	1,484,393	(247,881)	(248,528)	16,296
Ending Balance (in shares) at Dec. 31, 2011		83,757,000
Increase (Decrease) in Stockholders' Equity
Net income	257,216			257,411			(195)
Unrecognized amounts from defined benefit pension plans, net of tax	(6,475)				(6,475)
Unrealized gain on derivatives designated and qualifying as cash flow hedges, net of tax	(832)				(832)
Currency translation adjustment	19,635				19,788		(153)
Cash dividends declared - $0.83, $0.710, and $0.635 per share during the year 2013, 2012 and 2011, respectively	(59,136)			(59,136)
Issuance of shares under benefit plans	35,689		26,020			9,669
Issuance of shares under benefit plans (in shares)		985,000
Purchase of shares for treasury	(81,018)					(81,018)
Purchase of shares for treasury (in shares)		(1,797,000)
Ending Balance at Dec. 31, 2012	1,358,321	9,858	205,124	1,682,668	(235,400)	(319,877)	15,948
Ending Balance (in shares) at Dec. 31, 2012	82,944,817	82,945,000
Increase (Decrease) in Stockholders' Equity
Net income	291,687			293,780			(2,093)
Unrecognized amounts from defined benefit pension plans, net of tax	101,151				101,151
Unrealized gain on derivatives designated and qualifying as cash flow hedges, net of tax	289				289
Currency translation adjustment	(19,955)				(18,136)		(1,819)
Cash dividends declared - $0.83, $0.710, and $0.635 per share during the year 2013, 2012 and 2011, respectively	(67,986)			(67,986)
Issuance of shares under benefit plans	41,153		33,693			7,460
Issuance of shares under benefit plans (in shares)		787,000
Purchase of shares for treasury	(167,879)					(167,879)
Purchase of shares for treasury (in shares)	(2,671,614)	(2,722,000)
Equity (Increase) Decrease from Transactions with Noncontrolling Interest Holders	(6,093)		1,702		155		(7,950)
Ending Balance at Dec. 31, 2013	$ 1,530,688	$ 9,858	$ 240,519	$ 1,908,462	$ (151,941)	$ (480,296)	$ 4,086
Ending Balance (in shares) at Dec. 31, 2013	81,010,084	81,010,000