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LEASES - Lease Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Fixed lease cost $ 2,100 $ 2,100
Variable lease cost 45 54
Total $ 2,145 $ 2,154
Weighted-average remaining lease term (years) 55 years 10 months 24 days 56 years 7 months 6 days
Weighted-average discount rate 6.30% 6.30%