SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Impairment of Long-Lived Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of assets	$ 0	$ 0	$ 3,202