CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 292	$ 348
Accounts receivable, less allowance for doubtful accounts of $2,743 and $2,494	183,749	179,667
Derivative assets	5,463	4,421
Deferred tax asset	39,411	51,414
Inventory and other	18,664	12,451
Total current assets	247,579	248,301
Derivative assets	4,760	9,233
Equity method investments		129,034
Natural gas and oil properties, successful efforts method	9,732,010	9,032,881
Accumulated depletion and depreciation	(2,336,666)	(2,274,444)
Natural gas and oil properties, successful efforts method, net	7,395,344	6,758,437
Transportation and field assets	123,471	118,625
Accumulated depreciation and amortization	(84,807)	(85,841)
Transportation and field assets, net	38,664	32,784
Other assets	114,211	121,297
Total assets	7,800,558	7,299,086
Current liabilities:
Accounts payable	291,107	258,431
Asset retirement obligations	5,037	5,037
Accrued liabilities	158,518	161,520
Accrued interest	41,243	44,375
Derivative liabilities	62,965	26,198
Total current liabilities	558,870	495,561
Bank debt	480,000	500,000
Subordinated notes	2,350,000	2,640,516
Deferred tax liability	894,115	771,980
Derivative liabilities	7,101	25
Deferred compensation liability	240,787	247,537
Asset retirement obligations and other liabilities	249,511	229,015
Total liabilities	4,780,384	4,884,634
Commitments and contingencies
Stockholders’ Equity
Preferred stock, $1 par, 10,000,000 shares authorized, none issued and outstanding
Common stock, $0.01 par, 475,000,000 shares authorized, 168,693,792 issued at June 30, 2014 and 163,441,414 issued at December 31, 2013	1,687	1,634
Common stock held in treasury, 83,184 shares at June 30, 2014 and 98,520 shares at December 31, 2013	(3,096)	(3,637)
Additional paid-in capital	2,378,254	1,959,636
Retained earnings	641,379	450,583
Accumulated other comprehensive income	1,950	6,236
Total stockholders’ equity	3,020,174	2,414,452
Total liabilities and stockholders’ equity	$ 7,800,558	$ 7,299,086