CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash Flows From Operating Activities
Net income (loss)	$ 373,146	$ (297,428)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	368,305	403,250
Impairment of natural gas and oil properties		800,652	[1]
Deferred income taxes	232,838	(182,596)
Unrealized gain on derivatives	(62,560)	(2,031)
Stock-based compensation	5,962	5,549
Other	1,198	(2,049)
Change in assets and liabilities:
Accounts receivable	(68,309)	69,166
Inventories	(6,222)	8,088
Accounts payable	48,193	(1,349)
Taxes payable	17,590	20,762
Interest payable	(383)	4,762
Advances from partners	(68,919)	31,995
Other assets and liabilities	36,713	(21,381)
Net cash provided by operating activities	877,552	837,390
Cash Flows From Investing Activities
Capital investments	(1,175,634)	(1,140,661)
Proceeds from sale of property and equipment		174,337
Transfers to restricted cash		(167,750)
Transfers from restricted cash	8,542	23,366
Other	5,628	8,895
Net cash used in investing activities	(1,161,464)	(1,101,813)
Cash Flows From Financing Activities
Payments on current portion of long-term debt	(600)	(600)
Payments on revolving long-term debt	(1,233,150)	(1,273,700)
Borrowings under revolving long-term debt	1,463,150	602,200
Change in bank drafts outstanding	21,214	(30,730)
Proceeds from issuance of long-term debt		998,780
Debt issuance costs		(8,338)
Proceeds from exercise of common stock options	5,283	2,698
Net cash provided by financing activities	255,897	290,310
Effect of exchange rate changes on cash	117	(15)
Increase (decrease) in cash and cash equivalents	(27,898)	25,872
Cash and cash equivalents at beginning of year	53,583	15,627
Cash and cash equivalents at end of period	$ 25,685	$ 41,499

[1] Interest expense and the provision for income taxes by segment are allocated as they are incurred at the corporate level.