Consolidated Statements Of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
REVENUE	$ 100,252	$ 198,037	$ 202,874
EXPENSES:
Depreciation and amortization	80,923	121,023	121,598
Cost of sales	195	304	475
Selling, general and administrative	22,184	29,799	25,971
Total operating expenses	103,302	151,126	148,044
INCOME (LOSS) FROM OPERATIONS	(3,050)	46,911	54,830
Interest expense	(25,430)	(25,222)	(28,213)
Interest income	40	193	362
Foreign currency exchange losses	(1,650)	(1,974)	(2,222)
Loss on early extinguishment of debt	0	0	(1,504)
Other income	5	63	488
Income (loss) before income taxes	(30,085)	19,971	23,741
Provision (benefit) for income taxes	79,905	10,293	(89,940)
NET INCOME (LOSS)	$ (109,990)	$ 9,678	$ 113,681