Property And Equipment (Tables)

3 Months Ended

Mar. 31, 2012

Property And Equipment [Abstract]

Schedule Of Property And Equipment

	March 31, 2012			December 31, 2011
Oil and natural gas properties	$	1,130,838,000		$	1,035,754,000
Office furniture and fixtures		3,774,000			3,692,000
Building		3,926,000			4,049,000
Land		260,000			283,000
Total property and equipment		1,138,798,000			1,043,778,000
Accumulated depletion, depreciation, amortization and impairment		(596,530,000	)		(575,142,000	)
Property and equipment, net	$	542,268,000		$	468,636,000

Summary Of Oil And Gas Properties Not Subject To Amortization

	March 31, 2012
West Texas Permian	$	13,843,000
Colorado		4,441,000
Bakken		304,000
Southern Louisiana		357,000
Ohio		150,887,000
Belize		5,711,000
Other		44,000
	$	175,587,000

Schedule Of Asset Retirement Obligation

	March 31, 2012			March 31, 2011
Asset retirement obligation, beginning of period	$	12,653,000		$	10,845,000
Liabilities incurred		598,000			174,000
Liabilities settled		(531,000	)		—
Accretion expense		176,000			159,000
Asset retirement obligation as of end of period		12,896,000			11,178,000
Less current portion		620,000			635,000
Asset retirement obligation, long-term	$	12,276,000		$	10,543,000