Revision of Prior Period Amounts, Cash Flows (Details) (USD $)	9 Months Ended
	Sep. 30, 2010 As Previously Reported		Sep. 30, 2010 Adjustment
Consolidated Statement of Cash Flows
Net income	$ 167,241,000	[1]	$ 2,837,000
Depreciation, amortization and accretion	570,619,000	[1]	(4,574,000)
Deferred income taxes, net	55,102,000	[1]	1,737,000
Cash flows from operating activities	$ 764,780,000	[1]

[1] In Quarterly Report on Form 10-Q for the period ended September 30, 2010, filed on November 4, 2010.