Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current [Abstract]
Federal	$ (2,103)	$ (3,883)	$ (8,626)
State	(675)	(190)	(1,249)
Current income tax (provision) benefit	(2,778)	(4,073)	(9,875)
Deferred [Abstract]
Federal	777	5,011	5,878
State	80	(168)	273
Deferred income tax (provision) benefit	857	4,843	6,151
Income tax (provision) benefit	(1,921)	770	(3,724)
Income tax (provision) benefit, continuing and discontinued operations [Abstract]
From continuing operations	(2,691)	770	(3,561)
From discontinued operations	0	0	(163)
From equity investments	770	0	0
Income tax (provision) benefit	(1,921)	770	(3,724)
Reconciliation of taxes computed at the corporate federal income tax rate to the reported income tax (provision) [Abstract]
Statutory federal income tax (provision) benefit	(1,552)	716	(3,587)
State income tax (provision) benefit	(387)	(233)	(634)
Federal statutory depletion	62	144	549
Other	(44)	143	(52)
Income tax (provision) benefit	(1,921)	770	$ (3,724)
Long-term deferred tax asset (liability) [Abstract]
Prepaid and other insurance	(1,058)	(1,243)
Property	(7,341)	(7,408)
Equity method investment	606	0
Uniform capitalization	729	704
Other	(93)	(51)
Net long-term deferred tax liability	(7,157)	(7,998)
Net deferred tax liability	$ (7,157)	$ (7,998)
Federal [Member]
Income Tax Examination [Line Items]
Earliest Open Tax Year	2013
Texas [Member]
Income Tax Examination [Line Items]
Earliest Open Tax Year	2012
Louisiana [Member]
Income Tax Examination [Line Items]
Earliest Open Tax Year	2013
Michigan [Member]
Income Tax Examination [Line Items]
Earliest Open Tax Year	2012