LEASES - Additional information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Payments under operating leases	$ 1,054,000	$ 1,200,000	$ 408,000
Rental income earned on office space leased to third parties	$ 449,000	$ 426,000	$ 148,000
Minimum [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	1 year
Lessee, Operating Lease, Renewal Term	1 year
Maximum [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	15 years
Lessee, Operating Lease, Options to Extend	5 years
Lessee, Operating Lease, Option to Expire	1 year
Lessee, Operating Lease, Renewal Term	25 years