Annual report pursuant to Section 13 and 15(d)

LEASES - Narrative (Details)

v3.20.4
LEASES - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
property
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Lessee, Lease, Description [Line Items]      
Number of properties subject to non-cancelable leasehold interest agreements | property 8    
Real Estate Leasehold Interests      
Lessee, Lease, Description [Line Items]      
Rent expense $ 1.8 $ 1.6  
Rent expense     $ 1.6
Real Estate Leasehold Interests | Minimum      
Lessee, Lease, Description [Line Items]      
Remaining lease terms (in years) 14 years    
Real Estate Leasehold Interests | Maximum      
Lessee, Lease, Description [Line Items]      
Remaining lease terms (in years) 72 years    
Office Leases      
Lessee, Lease, Description [Line Items]      
Rent expense $ 0.4 $ 0.3  
Rent expense     $ 0.2
Office Leases | Minimum      
Lessee, Lease, Description [Line Items]      
Remaining lease terms (in years) 2 years    
Office Leases | Maximum      
Lessee, Lease, Description [Line Items]      
Remaining lease terms (in years) 8 years