INVESTMENTS (Equity Method Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Equity method investment	$ 3,802	$ 3,616
Equity method investments at fair value	21,540	21,843
Total equity method investments	$ 25,342	$ 25,459