COMMITMENTS & CONTINGENCIES (Maturity analysis of operating lease liabilities) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Within one year	$ 696
After one but within two years	599
After two but within three years	610
After three but within four years	618
After four but within five years	646
After five years	8,284
Total undiscounted cash flows	11,453
Discount on cash flows	3,260
Total lease liability	$ 8,193	$ 8,495
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	18 years 4 months 6 days	18 years 9 months 18 days
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	10 months 24 days	0 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	24 years	25 years