CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2009	$ 3,110,370	$ 14,237	$ 1,078,337	$ 2,169,526	$ (1,409)	$ (150,321)
Balance (in shares) at Dec. 31, 2009		113,833
Stock issued in acquisition of SKDP (in shares)		11,725
Stock issued in acquisition of SKDP	337,907	1,466	336,441
Stock issued under share-based compensation plans (in shares)		636
Stock issued under share-based compensation plans	2,157	89	4,645	0	(2,577)	0
Stock-based compensation	10,469	0	10,469	0	0	0
Excess tax benefit from stock-based compensation plans	(42)	0	(42)	0	0	0
Net income	222,710	0	0	222,710	0	0
Balance at Sep. 30, 2010	3,683,571	15,792	1,429,850	2,392,236	(3,986)	(150,321)
Balance (in shares) at Sep. 30, 2010		126,294
Balance at Dec. 31, 2010	3,752,310	15,794	1,433,999	2,449,521	(1,509)	(145,495)
Balance (in shares) at Dec. 31, 2010		126,294
Stock issued under share-based compensation plans (in shares)		1,178
Stock issued under share-based compensation plans	13,503	150	14,957	0	(1,604)	0
Shares reacquired (in shares)		(2,508)
Shares reacquired	(80,924)	0	0	0	(80,924)	0
Stock-based compensation	16,766	0	16,766	0	0	0
Excess tax benefit from stock-based compensation plans	5,128	0	5,128	0	0	0
Net income	691,740	0	0	691,740	0	0
Balance at Sep. 30, 2011	$ 4,398,523	$ 15,944	$ 1,470,850	$ 3,141,261	$ (84,037)	$ (145,495)
Balance (in shares) at Sep. 30, 2011		124,964