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, 2010	$ 1,279,774	$ 1,279,013	$ 123,766	$ 817	$ (443,019)	$ 318,346	$ 851
Increase (Decrease) in Stockholders' Equity
Net income (loss)	144,998	145,063					(65)
Foreign currency translation adjustments	(5,256)		(5,274)				18
Changes in unrecognized pension gains/losses and related amortization, net of tax	1,213		1,213
Changes in treasury locks, net of tax	65		65
Net (loss) gain on derivatives, net of tax	1		1
Stock option exercises & restricted stock vestings	34,147			8	69	34,070
Cash dividends declared on common stock	(38,769)	(38,769)
Non-Controlling interest distribution	(27)						(27)
Treasury stock purchased	(79,640)				(79,640)
Balance at Sep. 30, 2011	1,336,506	1,385,307	119,771	825	(522,590)	352,416	777
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) gain 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