DEBT, Repayment of Credit Facility Debt (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Apr. 30, 2015	Jun. 30, 2015	Jun. 30, 2014
Credit Facility Debt [Abstract]
Prepayment of credit facility debt	$ 200,000	$ 230,415	$ 759,861
Loss on extinguishment of debt		(731)
Unamortized deferred financing costs written off		$ 1,004