CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2011	$ 22,119		$ 753,119	$ (12,646)	$ 762,592
Balance (in shares) at Dec. 31, 2011	221,188
Stock issued for stock incentive plans, net	77	4,009			4,086
Stock issued for stock incentive plans, net (in shares)	773
Stock purchased and retired	(197)	(6,237)	(23,608)		(30,042)
Stock purchased and retired (in shares)	(1,967)
Net income available for stockholders:			153,015		153,015
Pension adjustment, net of taxes				212	212
Foreign currency translation, net of taxes				(18)	(18)
Unrealized loss on securities, net of taxes				(121)	(121)
Dividends declared			(35,083)		(35,083)
Excess tax benefits for share-based payments		2,172			2,172
Three-for-two stock split	(56)	56
Three-for-two stock split (in shares)	(563)
Balance at Jun. 30, 2012	$ 21,943		$ 847,443	$ (12,573)	$ 856,813
Balance (in shares) at Jun. 30, 2012	219,431