CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 22,938		$ 53,583
Restricted cash			8,542
Accounts receivable	464,045		377,638
Inventories	37,745		28,141
Derivative asset	70,871		282,693
Other current assets	48,576		58,315
Total current assets	644,175		808,912
Property and Equipment:
Natural gas and oil properties, using the full cost method, including $956.5 million in 2013 and $1,023.9 million in 2012 excluded from amortization	13,293,841		11,283,114
Gathering systems	1,306,074		1,148,261
Other	702,544		597,064
Less: Accumulated depreciation, depletion and amortization	(8,005,836)		(7,191,463)
Total property and equipment, net	7,296,623		5,836,976
Other long-term assets	106,928		91,639
TOTAL ASSETS	8,047,726		6,737,527
Current liabilities:
Accounts payable	507,468		459,569
Taxes payable	68,019		62,980
Interest payable	33,485		34,431
Advances from partners			68,919
Current deferred income taxes	24,353		106,123
Other current liabilities	54,686		35,749
Total current liabilities	688,011		767,771
Long-term debt	1,950,096		1,668,273
Deferred income taxes	1,532,329		1,049,138
Pension and other postretirement liabilities	15,823		33,174
Other long-term liabilities	239,437		183,299
Total long-term liabilities	3,737,685		2,933,884
Commitments and contingencies
Equity:
Common stock, $0.01 par value; authorized 1,250,000,000 shares; issued 352,938,584 shares in 2013 and 351,100,391 in 2012	3,529		3,511
Additional paid-in capital	970,524		934,939
Retained earnings	2,652,653		1,949,150
Accumulated other comprehensive income	(4,342)	[1]	149,804	[1]
Common stock in treasury, 9,924 shares in 2013 and 64,715 in 2012	(334)		(1,532)
Total equity	3,622,030		3,035,872
TOTAL LIABILITIES AND EQUITY	$ 8,047,726		$ 6,737,527

[1] All amounts are net of tax.