RIGHT-OF-USE ASSETS UNDER OPERATING LEASES (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Right-of-use assets under operating leases	$ 34,422	$ 34,422			$ 0
Less: Accumulated amortization	(8,394)	(8,394)			0
Total	26,028	26,028		$ 42,100	$ 0
Amortization of right-of-use assets under operating leases	$ 2,900	$ 9,145	$ 0