Annual report pursuant to Section 13 and 15(d)

Lease Commitments Payments for Ground Leases (Details)

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Lease Commitments Payments for Ground Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Lessor, Lease, Description [Line Items]    
Total ground leases $ 900 $ 975
Amscot Building    
Lessor, Lease, Description [Line Items]    
Total ground leases $ 25 25
Expiration Year 2045  
Beaver Ruin Village    
Lessor, Lease, Description [Line Items]    
Total ground leases $ 54 54
Expiration Year 2054  
Beaver Ruin Village II    
Lessor, Lease, Description [Line Items]    
Total ground leases $ 22 22
Expiration Year 2056  
Leased office space Charleston, SC    
Lessor, Lease, Description [Line Items]    
Total ground leases $ 0 67
Expiration Year 2019  
Moncks Corner    
Lessor, Lease, Description [Line Items]    
Total ground leases $ 121 121
Expiration Year 2040  
Devine Street    
Lessor, Lease, Description [Line Items]    
Total ground leases $ 396 396
Expiration Year 2051  
JANAF    
Lessor, Lease, Description [Line Items]    
Total ground leases $ 282 290
Expiration Year 2069  
Ground leases variable percentage rent $ 131 $ 139