Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Disaggregation of Revenues (Details)

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Summary of Significant Accounting Policies - Disaggregation of Revenues (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation of Revenue [Line Items]    
Operating Lease, Lease Income, Lease Payments $ 12,113 $ 12,461
Non-lease revenues 219 225
Total 15,728 16,085
Credit losses on operating lease receivables (154) (90)
Total Revenue 15,574 15,995
Tenant reimbursements - variable lease revenue    
Disaggregation of Revenue [Line Items]    
Variable lease revenue 3,288 3,287
Percentage rent - variable lease revenue    
Disaggregation of Revenue [Line Items]    
Variable lease revenue 108 112
Lease termination fees    
Disaggregation of Revenue [Line Items]    
Non-lease revenues 62 49
Other    
Disaggregation of Revenue [Line Items]    
Non-lease revenues $ 157 $ 176