Guarantor/Non Guarantor Condensed Consolidated Financial Statements (Statements of Operations (Unaudited)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 95,757	$ 74,952
Costs and expenses:
Operating Costs	72,748	52,289
Depreciation and amortization	24,992	29,824
General and administrative	17,724	16,508
Bad debt recovery	(363)	(55)
Gain on dispositions of property and equipment, net	(471)	(600)
Intercompany leasing	0	0
Total costs and expenses	114,630	97,966
Income (loss) from operations	(18,873)	(23,014)
Other (expense) income:
Equity in earnings of subsidiaries	0	0
Interest expense, net of interest capitalized	(6,059)	(6,254)
Other	(144)	(389)
Total other (expense) income	(6,203)	(6,643)
Income (loss) before income taxes	(25,076)	(29,657)
Income tax (expense) benefit	(48)	1,958
Net income (loss)	(25,124)	(27,699)
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues	0	0
Costs and expenses:
Operating Costs	0	0
Depreciation and amortization	0	0
General and administrative	(138)	(138)
Bad debt recovery	0	0
Gain on dispositions of property and equipment, net	0	0
Intercompany leasing	0	0
Total costs and expenses	(138)	(138)
Income (loss) from operations	138	138
Other (expense) income:
Equity in earnings of subsidiaries	9,233	21,263
Interest expense, net of interest capitalized	0	0
Other	(138)	(138)
Total other (expense) income	9,095	21,125
Income (loss) before income taxes	9,233	21,263
Income tax (expense) benefit	0	0
Net income (loss)	9,233	21,263
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues	85,086	73,856
Costs and expenses:
Operating Costs	65,155	50,310
Depreciation and amortization	23,069	27,731
General and administrative	11,583	10,548
Bad debt recovery	(363)	(55)
Gain on dispositions of property and equipment, net	(456)	(555)
Intercompany leasing	(1,215)	(1,215)
Total costs and expenses	97,773	86,764
Income (loss) from operations	(12,687)	(12,908)
Other (expense) income:
Equity in earnings of subsidiaries	(648)	(4,846)
Interest expense, net of interest capitalized	(43)	(22)
Other	213	320
Total other (expense) income	(478)	(4,548)
Income (loss) before income taxes	(13,165)	(17,456)
Income tax (expense) benefit	4,580	1,039
Net income (loss)	(8,585)	(16,417)
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues	10,671	1,096
Costs and expenses:
Operating Costs	7,593	1,979
Depreciation and amortization	1,622	1,761
General and administrative	450	213
Bad debt recovery	0	0
Gain on dispositions of property and equipment, net	(15)	(45)
Intercompany leasing	1,215	1,215
Total costs and expenses	10,865	5,123
Income (loss) from operations	(194)	(4,027)
Other (expense) income:
Equity in earnings of subsidiaries	0	0
Interest expense, net of interest capitalized	0	2
Other	(235)	(564)
Total other (expense) income	(235)	(562)
Income (loss) before income taxes	(429)	(4,589)
Income tax (expense) benefit	(219)	(257)
Net income (loss)	(648)	(4,846)
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues	0	0
Costs and expenses:
Operating Costs	0	0
Depreciation and amortization	301	332
General and administrative	5,829	5,885
Bad debt recovery	0	0
Gain on dispositions of property and equipment, net	0	0
Intercompany leasing	0	0
Total costs and expenses	6,130	6,217
Income (loss) from operations	(6,130)	(6,217)
Other (expense) income:
Equity in earnings of subsidiaries	(8,585)	(16,417)
Interest expense, net of interest capitalized	(6,016)	(6,234)
Other	16	(7)
Total other (expense) income	(14,585)	(22,658)
Income (loss) before income taxes	(20,715)	(28,875)
Income tax (expense) benefit	(4,409)	1,176
Net income (loss)	$ (25,124)	$ (27,699)