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OTHER INTANGIBLE ASSETS - Intangible Assets and Liabilities and Related Accumulated Amortization and Accretion (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Liabilities    
Gross balance $ (2,368) $ (3,521)
Accumulated amortization 1,638 2,239
Net $ (730) $ (1,282)
Average useful life (in years) 4 years 4 years
Acquired Above-Market Leases    
Assets    
Gross balance $ 37 $ 74
Accumulated amortization (13) (42)
Net $ 24 $ 32
Average useful life (in years) 7 years 5 years
Acquired In-Place Leases    
Assets    
Gross balance $ 12,135 $ 13,653
Accumulated amortization (8,911) (9,382)
Net $ 3,224 $ 4,271
Average useful life (in years) 9 years 8 years
Trade Name and License    
Assets    
Gross balance $ 2,957 $ 2,957
Accumulated amortization 0 0
Net $ 2,957 $ 2,957