Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues	$ 22,455	$ 22,306
Costs and expenses
Operating costs	12,567	13,106
Selling, general and administrative	3,621	3,827
Depreciation and amortization	5,825	4,289
(Insurance recoveries) asset impairment, net	0	(841)
(Gain) loss on disposition of assets	(125)	393
Total costs and expenses	21,888	20,774
Operating income	567	1,532
Interest expense	(977)	(312)
(Loss) income before income taxes	(410)	1,220
Income tax expense (benefit)	4	(155)
Net (loss) income	$ (414)	$ 1,375
Net (loss) income per share:
Basic and diluted (usd per share)	$ (0.02)	$ 0.06
Weighted average number of common shares outstanding:
Basic and diluted (shares)	24,015	24,629