CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash Flows From Operating Activities
Net income	$ 304,063	$ 293,777
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	337,035	283,828
Deferred income taxes	197,767	185,181
Unrealized gain on derivatives	(3,975)	(2,275)
Stock-based compensation	4,686	4,433
Other	170	(1,449)
Change in assets and liabilities:
Accounts receivable	14,856	(31,156)
Inventories	6,761	14,833
Accounts payable	(7,380)	8,927
Taxes payable	(12,340)	4,213
Interest payable	(164)	178
Advances from partners	7,949	27,431
Other assets and liabilities	7,502	21,132
Net cash provided by operating activities	856,930	809,053
Cash Flows From Investing Activities
Capital investments	(1,024,658)	(985,310)
Proceeds from sale of property and equipment	121,133	348,374
Transfers to restricted cash	(85,002)	(355,773)
Other	3,879	(2,445)
Net cash used in investing activities	(984,648)	(995,154)
Cash Flows From Financing Activities
Payments on current portion of long-term debt	(600)	(600)
Payments on revolving long-term debt	(1,717,600)	(1,297,000)
Borrowings under revolving long-term debt	1,840,600	1,478,100
Change in bank drafts outstanding	9,260	5,059
Revolving credit facility costs	(10,210)	0
Proceeds from exercise of common stock options	3,365	1,306
Net cash provided by financing activities	124,815	186,865
Effect of exchange rate changes on cash	127	0
Increase (Decrease) in cash and cash equivalents	(2,776)	764
Cash and cash equivalents at beginning of year	16,055	13,184
Cash and cash equivalents at end of period	$ 13,279	$ 13,948