CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 13,279	$ 16,055
Restricted cash	85,002	0
Accounts receivable	336,717	351,573
Inventories	33,378	35,098
Hedging asset	183,278	130,412
Other	34,488	47,755
Total current assets	686,142	580,893
Property and Equipment:
Gas and oil properties, using the full cost method, including $806.4 million in 2011 and $712.1 million in 2010 excluded from amortization	8,570,320	7,749,863
Gathering systems	923,123	817,465
Other	480,381	413,557
Total property and equipment	9,973,824	8,980,885
Less: Accumulated depreciation, depletion and amortization	4,042,758	3,682,688
Property and equipment, net	5,931,066	5,298,197
Other Assets	124,893	138,373
TOTAL ASSETS	6,742,101	6,017,463
Current Liabilities:
Current portion of long-term debt	1,200	1,200
Accounts payable	536,213	473,890
Taxes payable	37,711	50,051
Interest payable	19,790	19,954
Advances from partners	89,654	81,705
Hedging liability	4,880	7,685
Current deferred income taxes	63,547	44,089
Other	14,354	15,409
Total current liabilities	767,349	693,983
Long-Term Debt	1,215,400	1,093,000
Other Liabilities:
Deferred income taxes	1,323,970	1,130,292
Long-term hedging liability	32,816	40,188
Pension and other postretirement liabilities	14,982	15,777
Other long-term liabilities	81,153	79,347
Total Other Liabilities	1,452,921	1,265,604
Commitments and Contingencies
Equity:
Common stock, $0.01 par value; authorized 1,250,000,000 shares; issued 348,108,100 shares in 2011 and 347,733,839 in 2010	3,481	3,477
Additional paid-in capital	874,827	862,423
Retained earnings	2,322,508	2,018,445
Accumulated other comprehensive income	108,383	83,975
Common stock in treasury, 125,550 shares in 2011 and 156,636 in 2010	(2,768)	(3,444)
Total Equity	3,306,431	2,964,876
TOTAL LIABILITIES AND EQUITY	$ 6,742,101	$ 6,017,463