CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities
Net income	$ 479,236	$ 454,415
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	516,891	435,515
Deferred income taxes	309,042	293,690
Unrealized gain (loss) on derivatives	905	(3,504)
Stock-based compensation	6,619	6,612
Other	(353)	(2,173)
Change in assets and liabilities:
Accounts receivable	4,664	(34,313)
Inventories	(5,993)	8,157
Accounts payable	1,539	25,090
Taxes payable	(21,165)	(915)
Interest payable	(9,365)	(9,808)
Advances from partners	14,568	25,825
Other assets and liabilities	3,623	16,471
Net cash provided by operating activities	1,300,211	1,215,062
Cash Flows From Investing Activities
Capital investments	(1,543,549)	(1,506,079)
Proceeds from sale of property and equipment	121,546	348,379
Transfers to restricted cash	(85,040)	(355,865)
Transfers from restricted cash	15,779	1,689
Other	4,940	(2,632)
Net cash used in investing activities	(1,486,324)	(1,514,508)
Cash Flows From Financing Activities
Payments on current portion of long-term debt	(600)	(600)
Payments on revolving long-term debt	(2,575,000)	(2,043,600)
Borrowings under revolving long-term debt	2,753,600	2,336,100
Change in bank drafts outstanding	10,621	5,546
Revolving credit facility costs	(10,211)	0
Proceeds from exercise of common stock options	4,844	3,013
Net cash provided by financing activities	183,254	300,459
Effect of exchange rate changes on cash	97	0
Increase (Decrease) in cash and cash equivalents	(2,762)	1,013
Cash and cash equivalents at beginning of year	16,055	13,184
Cash and cash equivalents at end of period	$ 13,293	$ 14,197