AVAILABLE FOR SALE SECURITIES (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Number of available for sale shares acquired (in shares)				4.1
Purchase of available for sale securities			$ 0	$ 48,219
Available for sale securities	$ 53,628		53,628		$ 45,754
Investment income, dividend	$ 600	$ 1,000	1,200	1,000
Available for sale securities, investment related expenses			$ 0	$ 3,400