CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents		$ 527	$ 448
Accounts receivable, less allowance for doubtful accounts of $7,112 and $7,111		294,448	348,833
Derivative assets		12,908	58,607
Inventory and other		30,064	21,346
Total current assets		337,947	429,234
Derivative assets		10,224	273
Goodwill		1,641,197	1,641,197
Natural gas and oil properties, successful efforts method	[1]	13,457,654	13,216,453
Accumulated depletion and depreciation	[1]	(3,807,356)	(3,649,716)
Natural gas and oil properties, successful efforts method, net	[1]	9,650,298	9,566,737
Other property and equipment		114,566	114,361
Accumulated depreciation and amortization		(101,294)	(99,695)
Other Property and equipment, net		13,272	14,666
Other assets		77,230	76,734
Total assets		11,730,168	11,728,841
Current liabilities:
Accounts payable		314,819	343,871
Asset retirement obligations		6,327	6,327
Accrued liabilities		282,809	317,531
Accrued interest		36,488	43,511
Derivative liabilities		38,403	44,233
Total current liabilities		678,846	755,473
Bank debt		1,180,227	1,208,467
Senior notes		2,852,860	2,851,754
Senior subordinated notes		48,607	48,585
Deferred tax liabilities		736,054	693,356
Derivative liabilities		3,835	9,789
Deferred compensation liabilities		101,334	101,102
Asset retirement obligations and other liabilities		293,813	286,043
Total liabilities		5,895,576	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, 249,236,392 issued at March 31, 2018 and 248,144,397 issued at December 31, 2017		2,492	2,481
Common stock held in treasury, 14,072 shares at March 31, 2018 and 14,967 shares at December 31, 2017		(569)	(599)
Additional paid-in capital		5,593,675	5,577,732
Accumulated other comprehensive loss		(1,263)	(1,332)
Retained earnings		240,257	195,990
Total stockholders’ equity		5,834,592	5,774,272
Total liabilities and stockholders’ equity		$ 11,730,168	$ 11,728,841

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