CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Condensed Consolidating Unaudited Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Schedule of Condensed Consolidating Statement of Operations [Line Items]
REVENUES	$ 110,653	$ 102,406	$ 319,885	$ 308,506
Direct operating expense	87,115	96,071	237,981	276,088
Depreciation and amortization expense	21,114	33,467	63,325	105,075
General and administrative expense	37,168	42,456	98,498	129,604
Impairment expense	0	40,000	187	40,000
Operating loss	(34,744)	(109,588)	(80,106)	(242,261)
Interest expense, net of amounts capitalized	8,090	21,120	23,672	64,061
Other expense (income), net	(4,578)	154	(5,779)	(665)
Loss before income taxes	(38,316)	(130,862)	(99,500)	(305,657)
Income tax expense (benefit)	96	110	1,238	489
Net loss	$ 38,220	130,752	$ 98,262	305,168
Parent Company
Schedule of Condensed Consolidating Statement of Operations [Line Items]
REVENUES		0		0
Direct operating expense		0		0
Depreciation and amortization expense		0		0
General and administrative expense		417		815
Impairment expense		0		0
Operating loss		(417)		(815)
Interest expense, net of amounts capitalized		21,120		64,061
Other expense (income), net		(636)		(1,926)
Loss before income taxes		(20,901)		(62,950)
Income tax expense (benefit)		0		(12)
Net loss		20,901		62,962
Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
REVENUES		99,332		298,926
Direct operating expense		92,643		265,869
Depreciation and amortization expense		32,347		101,557
General and administrative expense		39,738		121,427
Impairment expense		19,597		19,597
Operating loss		(84,993)		(209,524)
Interest expense, net of amounts capitalized		0		0
Other expense (income), net		375		281
Loss before income taxes		(85,368)		(209,805)
Income tax expense (benefit)		0		0
Net loss		85,368		209,805
Non-Guarantor Subsidiaries
Schedule of Condensed Consolidating Statement of Operations [Line Items]
REVENUES		3,110		9,866
Direct operating expense		3,456		10,481
Depreciation and amortization expense		1,120		3,518
General and administrative expense		2,301		7,362
Impairment expense		20,403		20,403
Operating loss		(24,170)		(31,898)
Interest expense, net of amounts capitalized		0		0
Other expense (income), net		325		657
Loss before income taxes		(24,495)		(32,555)
Income tax expense (benefit)		110		501
Net loss		24,385		32,054
Eliminations
Schedule of Condensed Consolidating Statement of Operations [Line Items]
REVENUES		(36)		(286)
Direct operating expense		(28)		(262)
Depreciation and amortization expense		0		0
General and administrative expense		0		0
Impairment expense		0		0
Operating loss		(8)		(24)
Interest expense, net of amounts capitalized		0		0
Other expense (income), net		90		323
Loss before income taxes		(98)		(347)
Income tax expense (benefit)		0		0
Net loss		$ 98		$ 347