Consolidated Statements Of Operations - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
REVENUE	$ 90,250,000	$ 94,546,000	$ 100,252,000
EXPENSES:
Depreciation and amortization	77,482,000	75,078,000	80,923,000
Cost of sales	96,000	76,000	195,000
Selling, general and administrative	20,291,000	24,119,000	22,184,000
Total operating expenses	97,869,000	99,273,000	103,302,000
LOSS FROM OPERATIONS	(7,619,000)	(4,727,000)	(3,050,000)
Interest expense	(25,164,000)	(25,337,000)	(25,430,000)
Interest income	512,000	370,000	40,000
Foreign currency exchange gains (losses)	8,000	109,000	(1,650,000)
Other income	97,000	1,765,000	5,000
Loss before income taxes	(32,166,000)	(27,820,000)	(30,085,000)
Provision (benefit) for income taxes	(685,000)	(3,396,000)	79,905,000
NET LOSS	$ (31,481,000)	$ (24,424,000)	$ (109,990,000)