Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current [Abstract]
Federal	$ (8,626)	$ (8,102)	$ (10,282)
State	(1,249)	(892)	(1,176)
Current income tax (provision) benefit	(9,875)	(8,994)	(11,458)
Deferred [Abstract]
Federal	5,878	(2,682)	(4,940)
State	273	(478)	(438)
Deferred income tax (provision) benefit	6,151	(3,160)	(5,378)
Income tax (provision) benefit	(3,724)	(12,154)	(16,836)
Income tax (provision) benefit, continuing and discontinued operations [Abstract]
From continuing operations	(3,561)	(12,429)	(16,664)
From discontinued operations	(163)	275	(172)
Income tax (provision) benefit	(3,724)	(12,154)	(16,836)
Reconciliation of taxes computed at the corporate federal income tax rate to the reported income tax (provision) [Abstract]
Statutory federal income tax (provision) benefit	(3,587)	(11,819)	(15,619)
State income tax (provision) benefit	(634)	(891)	(1,049)
Federal statutory depletion	549	522	36
Other	(52)	34	(204)
Income tax (provision) benefit	(3,724)	(12,154)	(16,836)
Current deferred tax asset (liability) [Abstract]
Allowance for doubtful accounts	62	424
Prepaid and other insurance	(719)	(855)
Fair value contracts	(1)	73
Net current deferred liability	(658)	(358)
Long-term deferred tax asset (liability) [Abstract]
Property	(12,673)	(18,964)
Uniform capitalization	661	613
Other	(170)	(283)
Net long-term deferred tax liability	(12,182)	(18,634)
Net deferred tax liability	$ (12,840)	$ (18,992)
Federal [Member]
Income Tax Examination [Line Items]
Earliest Open Tax Year	2011
Texas [Member]
Income Tax Examination [Line Items]
Earliest Open Tax Year	2010
Louisiana [Member]
Income Tax Examination [Line Items]
Earliest Open Tax Year	2011
Michigan [Member]
Income Tax Examination [Line Items]
Earliest Open Tax Year	2011