CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, unless otherwise specified	Total	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)	Common Stock Par Value	Treasury Stock	Capital in Excess of Par Value	Non-Controlling Interest
Balance at Dec. 31, 2009	$ 1,253,636	$ 1,150,017	$ 186,099	$ 806	$ (356,548)	$ 272,471	$ 791
Increase (Decrease) in Stockholders' Equity
Net income	173,589	173,481					108
Foreign currency translation adjustments	(56,741)		(56,693)				(48)
Changes in unrecognized pension gains/losses and related amortization, net of tax	(5,724)		(5,724)
Changes in treasury locks, net of tax	84		84
Stock option exercises & restricted stock vestings	45,888			11	2	45,875
Cash dividends declared on common stock	(44,485)	(44,485)
Treasury stock purchased	(86,473)				(86,473)
Balance at Dec. 31, 2010	1,279,774	1,279,013	123,766	817	(443,019)	318,346	851
Increase (Decrease) in Stockholders' Equity
Net income	183,630	183,683					(53)
Foreign currency translation adjustments	(47,411)		(47,436)				25
Changes in unrecognized pension gains/losses and related amortization, net of tax	(16,071)		(16,071)
Changes in treasury locks, net of tax	56		56
Net gain (loss) on derivatives, net of tax	3		3
Stock option exercises & restricted stock vestings	46,521			10	2	46,509
Cash dividends declared on common stock	(53,308)	(53,308)
Non-controlling interests distribution	(27)						(27)
Treasury stock purchased	(102,595)				(102,595)
Balance at Dec. 31, 2011	1,290,572	1,409,388	60,318	827	(545,612)	364,855	796
Increase (Decrease) in Stockholders' Equity
Net income	162,420	162,612					(192)
Foreign currency translation adjustments	19,507		19,503				4
Changes in unrecognized pension gains/losses and related amortization, net of tax	(19,340)		(19,340)
Changes in treasury locks, net of tax	209		209
Net gain (loss) on derivatives, net of tax	(7)		(7)
Stock option exercises & restricted stock vestings	65,372			13	4	65,355
Cash dividends declared on common stock	(58,442)	(58,442)
Treasury stock purchased	(79,793)				(79,793)
Balance at Dec. 31, 2012	$ 1,380,498	$ 1,513,558	$ 60,683	$ 840	$ (625,401)	$ 430,210	$ 608