CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Common Stock in Treasury	Total
Balance at Dec. 31, 2010	$ 3,477	$ 862,423	$ 2,018,445	$ 83,975	$ (3,444)	$ 2,964,876
Balance, shares at Dec. 31, 2010	347,734
Comprehensive income:
Net income	0	0	304,063	0	0	304,063
Change in derivatives	0	0	0	23,627	0	23,627
Change in pension and other postretirement liabilities	0	0	0	393	0	393	[1]
Currency translation adjustment	0	0	0	388	0	388
Comprehensive income	0	0	0	0	0	328,471
Stock-based compensations	0	8,501	0	0	0	8,501
Exercise of stock options, shares	398
Exercise of stock options	4	3,361	0	0	0	3,365
Issuance of restricted stock, shares	6
Issuance of restricted stock	0	0	0	0	0	0
Cancellation of restricted stock, shares	(30)
Cancellation of restricted stock	0	0	0	0	0	0
Treasury stock - non-qualified plan	0	542	0	0	676	1,218
Balance at Jun. 30, 2011	$ 3,481	$ 874,827	$ 2,322,508	$ 108,383	$ (2,768)	$ 3,306,431
Balance, shares at Jun. 30, 2011	348,108

[1] (4) Net of $0.1, $0.1, $0.2 and $0.2 million in taxes for the three months ended June 30, 2011 and 2010, and the six months ended June 30, 2011 and 2010, respectively.