CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents		$ 415	$ 448
Accounts receivable, less allowance for doubtful accounts of $5,615 and $7,111		362,490	348,833
Derivative assets			58,607
Inventory and other		21,967	21,346
Total current assets		384,872	429,234
Derivative assets		3,295	273
Goodwill		1,641,197	1,641,197
Natural gas and oil properties, successful efforts method	[1]	13,666,487	13,216,453
Accumulated depletion and depreciation	[1]	(3,961,365)	(3,649,716)
Natural gas and oil properties, successful efforts method, net	[1]	9,705,122	9,566,737
Other property and equipment		114,833	114,361
Accumulated depreciation and amortization		(101,643)	(99,695)
Other Property and equipment, net		13,190	14,666
Other assets		78,401	76,734
Total assets		11,826,077	11,728,841
Current liabilities:
Accounts payable		248,226	343,871
Asset retirement obligations		6,327	6,327
Accrued liabilities		341,428	317,531
Accrued interest		42,700	43,511
Derivative liabilities		101,328	44,233
Total current liabilities		740,009	755,473
Bank debt		1,304,584	1,208,467
Senior notes		2,853,948	2,851,754
Senior subordinated notes		48,630	48,585
Deferred tax liabilities		707,563	693,356
Derivative liabilities		10,088	9,789
Deferred compensation liabilities		87,087	101,102
Asset retirement obligations and other liabilities		310,133	286,043
Total liabilities		6,062,042	5,954,569
Commitments and contingencies
Stockholders’ Equity
Preferred stock, $1 par, 10,000,000 shares authorized, none issued and outstanding		0	0
Common stock, $0.01 par, 475,000,000 shares authorized, 249,437,273 issued at June 30, 2018 and 248,144,397 issued at December 31, 2017		2,494	2,481
Common stock held in treasury, 10,067 shares at June 30, 2018 and 14,967 shares at December 31, 2017		(404)	(599)
Additional paid-in capital		5,607,707	5,577,732
Accumulated other comprehensive loss		(1,194)	(1,332)
Retained earnings		155,432	195,990
Total stockholders’ equity		5,764,035	5,774,272
Total liabilities and stockholders’ equity		$ 11,826,077	$ 11,728,841

[1] Includes capitalized asset retirement costs and the associated accumulated amortization.