CONDENSED 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, 2011	$ 1,290,572	$ 1,409,388	$ 60,318	$ 827	$ (545,612)	$ 364,855	$ 796
Increase (Decrease) in Stockholders' Equity
Net income (loss)	127,566	127,622					(56)
Foreign currency translation adjustments	(9,795)		(9,795)
Changes in unrecognized pension gains/losses and related amortization, net of tax	2,234		2,234
Changes in treasury locks, net of tax	194		194
Net loss on derivatives, net of tax	(7)		(7)
Stock option exercises & restricted stock vestings	52,248			10	3	52,235
Cash dividends declared on common stock	(43,830)	(43,830)
Treasury stock purchased	(40,896)				(40,896)
Balance at Sep. 30, 2012	1,378,286	1,493,180	52,944	837	(586,505)	417,090	740
Balance at Dec. 31, 2012	1,380,498	1,513,558	60,683	840	(625,401)	430,210	608
Increase (Decrease) in Stockholders' Equity
Net income (loss)	135,090	135,095					(5)
Foreign currency translation adjustments	16,282		16,275				7
Changes in unrecognized pension gains/losses and related amortization, net of tax	3,294		3,294
Changes in treasury locks, net of tax	39		39
Stock option exercises & restricted stock vestings	55,536			12	1	55,523
Cash dividends declared on common stock	(49,674)	(49,674)
Treasury stock purchased	(80,222)				(80,222)
Balance at Sep. 30, 2013	$ 1,460,843	$ 1,598,979	$ 80,291	$ 852	$ (705,622)	$ 485,733	$ 610