NOTES PAYABLE (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Interest expense	$ 810	$ 12,901
Amortization of deferred financing costs	1,549	1,210
Interest expense incurred as a result of derivative instruments	16,900	100
Interest capitalized	1,070	170
Interest payable, current	6,500		$ 6,100
Interest Expense
Debt Instrument [Line Items]
Amortization of deferred financing costs	$ 1,600	$ 1,200