RIGHT-OF-USE ASSETS UNDER OPERATING LEASES, NET (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Right-of-use assets under operating leases	$ 35,013		$ 35,013		$ 39,729
Less: Accumulated amortization	(14,710)		(14,710)		(10,655)
Total	20,303		20,303		$ 29,074	$ 42,100
Amortization of right-of-use assets under operating leases	$ 2,600	$ 2,400	$ 8,100	$ 9,100