OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Accrued capital costs	$ 80,696	$ 122,364
Accrued operating expenses	2,863	1,119
Accrued taxes other than income	69	12
Accrued interest	232	0
Other	1,066	976
Total other current liabilities	$ 84,926	$ 124,471