CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 39,213	$ 26,623
Accounts receivable:
Oil and gas sales	43,264	39,268
Joint interest and other, net of allowance for doubtful accounts of $1,184 at March 31, 2014 and December 31, 2013	17,326	17,121
Affiliates	137	264
Inventory	38,943	39,183
Deferred income taxes	6,383	7,581
Fair value of derivatives	0	2,518
Prepaids and other	4,795	5,753
TOTAL CURRENT ASSETS	150,061	138,311
PROPERTY AND EQUIPMENT
Oil and gas properties, successful efforts method	2,413,224	2,403,277
Pipelines and other midstream facilities	56,101	54,800
Contract drilling equipment	103,927	96,270
Other	20,630	20,620
PROPERTY AND EQUIPMENT, GROSS	2,593,882	2,574,967
Less accumulated depreciation, depletion and amortization	(1,409,635)	(1,375,860)
Property and equipment, net	1,184,247	1,199,107
Debt issue costs, net
Debt issue costs, net	12,115	12,785
Investments and other	16,407	16,534
TOTAL OTHER ASSETS	28,522	29,319
Total assets	1,362,830	1,366,737
Accounts payable:
Trade	75,436	75,872
Oil and gas sales	42,064	37,834
Affiliates	1,463	874
Fair value of derivatives	1,594	208
Accrued liabilities and other	35,814	21,607
TOTAL CURRENT LIABILITIES	156,371	136,395
NON-CURRENT LIABILITIES
Long-term debt	599,653	639,638
Deferred income taxes	146,076	140,809
Asset retirement obligations	47,813	49,981
Deferred revenue from volumetric production payment	28,056	29,770
Accrued compensation under non-equity award plans	18,752	15,469
Other	934	892
TOTAL NON-CURRENT LIABILITIES	841,284	876,559
COMMITMENTS AND CONTINGENCIES (Note 14)
STOCKHOLDERS’ EQUITY
Preferred stock, par value $.10 per share, authorized — 3,000,000 shares; none issued	0	0
Common stock, par value $.10 per share, authorized — 30,000,000 shares; issued and outstanding — 12,165,536 shares at March 31, 2014 and December 31, 2013	1,216	1,216
Additional paid-in capital	152,556	152,556
Retained earnings	211,403	200,011
TOTAL STOCKHOLDERS' EQUITY	365,175	353,783
Total liabilities and equity	$ 1,362,830	$ 1,366,737