Supplemental Guarantors Consolidating Condensed Financial Information (Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Condensed Financial Statements, Captions
REVENUE	$ 11,950	$ 24,326
EXPENSES:
Depreciation and amortization	15,101	23,080
Cost of sales	22	100
Selling, general and administrative	5,959	6,314
Total operating expenses	21,082	29,494
LOSS FROM OPERATIONS	(9,132)	(5,168)
Interest expense, net	(6,356)	(6,307)
Foreign currency exchange gains (losses)	173	(1,459)
Other income	6	0
Loss before income taxes and equity in loss of subsidiaries	(15,309)	(12,934)
Benefit for income taxes	(1,445)	(5,288)
Equity in loss of subsidiaries	0	0
NET LOSS	(13,864)	(7,646)
Parent [Member]
Condensed Financial Statements, Captions
REVENUE	0	0
EXPENSES:
Depreciation and amortization	0	0
Cost of sales	0	0
Selling, general and administrative	213	304
Total operating expenses	213	304
LOSS FROM OPERATIONS	(213)	(304)
Interest expense, net	(5,656)	(5,460)
Foreign currency exchange gains (losses)	0	0
Other income	0
Loss before income taxes and equity in loss of subsidiaries	(5,869)	(5,764)
Benefit for income taxes	0	(2,461)
Equity in loss of subsidiaries	(7,995)	(4,343)
NET LOSS	(13,864)	(7,646)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions
REVENUE	10,474	11,763
EXPENSES:
Depreciation and amortization	8,910	12,119
Cost of sales	15	78
Selling, general and administrative	4,087	4,379
Total operating expenses	13,012	16,576
LOSS FROM OPERATIONS	(2,538)	(4,813)
Interest expense, net	(607)	(711)
Foreign currency exchange gains (losses)	0	(3)
Other income	6
Loss before income taxes and equity in loss of subsidiaries	(3,139)	(5,527)
Benefit for income taxes	(27)	(2,419)
Equity in loss of subsidiaries	(4,881)	(1,248)
NET LOSS	(7,993)	(4,356)
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions
REVENUE	1,819	12,898
EXPENSES:
Depreciation and amortization	6,204	10,974
Cost of sales	7	22
Selling, general and administrative	1,987	1,966
Total operating expenses	8,198	12,962
LOSS FROM OPERATIONS	(6,379)	(64)
Interest expense, net	(93)	(136)
Foreign currency exchange gains (losses)	173	(1,456)
Other income	0
Loss before income taxes and equity in loss of subsidiaries	(6,299)	(1,656)
Benefit for income taxes	(1,418)	(408)
Equity in loss of subsidiaries	0	0
NET LOSS	(4,881)	(1,248)
Consolidating Eliminations [Member]
Condensed Financial Statements, Captions
REVENUE	(343)	(335)
EXPENSES:
Depreciation and amortization	(13)	(13)
Cost of sales	0	0
Selling, general and administrative	(328)	(335)
Total operating expenses	(341)	(348)
LOSS FROM OPERATIONS	(2)	13
Interest expense, net	0	0
Foreign currency exchange gains (losses)	0	0
Other income	0
Loss before income taxes and equity in loss of subsidiaries	(2)	13
Benefit for income taxes	0	0
Equity in loss of subsidiaries	12,876	5,591
NET LOSS	$ 12,874	$ 5,604