FIXED ASSETS, NET (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation	$ 43,600	$ 48,400	$ 66,600
Impairment of Long-Lived Assets Held-for-use		25,300
Asset impairment charges	$ 0	26,624	$ 7,502
Cost of revenue | Equipment Deposits [Member]
Property, Plant and Equipment [Line Items]
Asset impairment charges		$ 1,300