CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited) (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Earnings [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2012	$ 4,919,230	$ 254,119	$ 834,677	$ 7,199,227	$ (54,906)	$ (3,313,887)
Net earnings	210,003	0	0	210,003	0	0
Dividends paid	(60,297)	0	0	(60,297)	0	0
Common stock issued for the exercise of stock options and SARs	(1,069)	557	(1,626)	0	0	0
Tax benefit from the exercise of stock options	8,780	0	8,780	0	0	0
Stock-based compensation expense	8,348	0	8,348	0	0	0
Common stock acquired	(291,935)	0	0	0	0	(291,935)
Other comprehensive earnings, net of tax	(31,279)	0	0	0	(31,279)	0
Balance at Mar. 31, 2013	$ 4,761,781	$ 254,676	$ 850,179	$ 7,348,933	$ (86,185)	$ (3,605,822)