CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 10,726	$ 17,525
Accounts receivable:
Oil and gas sales	32,371	41,282
Joint interest and other, net of allowance for doubtful accounts of $1,193 at December 31, 2012 and $1,215 at December 31, 2011	16,767	14,517
Affiliates	353	990
Inventory	41,703	44,868
Deferred income taxes	8,560	8,948
Fair value of derivatives	7,495	0
Prepaids and other	6,495	14,813
TOTAL CURRENT ASSETS	124,470	142,943
PROPERTY AND EQUIPMENT
Oil and gas properties, successful efforts method	2,570,803	2,103,085
Pipelines and other midstream facilities	49,839	26,040
Contract drilling equipment	91,163	75,956
Other	20,245	19,134
PROPERTY AND EQUIPMENT, GROSS	2,732,050	2,224,215
Less accumulated depreciation, depletion and amortization	(1,311,692)	(1,156,664)
Property and equipment, net	1,420,358	1,067,551
OTHER ASSETS
Debt issue costs, net	10,259	11,644
Fair value of derivatives	4,236	0
Investments and other	15,261	4,133
TOTAL OTHER ASSETS	29,756	15,777
TOTAL ASSETS	1,574,584	1,226,271
Accounts payable:
Trade	73,026	98,645
Oil and gas sales	32,146	37,409
Affiliates	164	1,501
Fair value of derivatives	0	5,633
Accrued liabilities and other	15,578	13,042
TOTAL CURRENT LIABILITIES	120,914	156,230
NON-CURRENT LIABILITIES
Long-term debt	809,585	529,535
Deferred income taxes	155,830	134,209
Fair value of derivatives	0	494
Asset retirement obligations	51,477	40,794
Deferred revenue from volumetric production payment	37,184	0
Accrued compensation under non-equity award plans	20,058	20,757
Other	920	751
TOTAL NON-CURRENT LIABILITIES	1,075,054	726,540
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 — 12,164,536 shares at December 31, 2012 and 12,163,536 shares at December 31, 2011	1,216	1,216
Additional paid-in capital	152,527	152,515
Retained earnings	224,873	189,770
TOTAL STOCKHOLDERS' EQUITY	378,616	343,501
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,574,584	$ 1,226,271