CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Comprehensive Income (Loss)	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2010	$ 538,895		$ 14,818	$ 6,460	$ 527,150	$ (9,533)
Beginning Balance (in shares) at Dec. 31, 2010			148,176
Stock issued for stock incentive plans, net (in shares)			1,237
Stock issued for stock incentive plans, net	6,835		123	6,712
Stock purchased and retired (in shares)			(1,099)
Stock purchased and retired	(19,628)		(110)	(16,606)	(2,912)
Net income	221,800	221,800			221,800
Pension adjustment, net of taxes	221	221				221
Change in cash flow hedge, net of taxes	387	387				387
Foreign currency translation, net of taxes	(289)	(289)				(289)
Unrealized loss on securities, net of taxes	(326)	(326)				(326)
Comprehensive income		221,793
Dividends declared	(32,501)				(32,501)
Excess tax benefits for share- based payments	3,434			3,434
Ending Balance at Sep. 30, 2011	$ 718,828		$ 14,831	$ 0	$ 713,537	$ (9,540)
Ending Balance (in shares) at Sep. 30, 2011			148,314