Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Properties Subject to Ground Leases (Details)

v3.10.0.1
Commitments and Contingencies - Properties Subject to Ground Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Commitments And Contingencies Disclosure [Line Items]      
Ground lease expenses $ 812 $ 555 $ 441
JANAF Acquisition [Member]      
Commitments And Contingencies Disclosure [Line Items]      
Ground lease expenses $ 258 0 0
Lease termination year 2069    
Amscot Building [Member]      
Commitments And Contingencies Disclosure [Line Items]      
Ground lease expenses $ 18 18 18
Lease termination year 2045    
Beaver Ruin Village [Member]      
Commitments And Contingencies Disclosure [Line Items]      
Ground lease expenses $ 46 46 46
Lease termination year 2054    
Beaver Ruin Village II [Member]      
Commitments And Contingencies Disclosure [Line Items]      
Ground lease expenses $ 19 19 18
Lease termination year 2056    
WHLR Charleston Office [Member]      
Commitments And Contingencies Disclosure [Line Items]      
Ground lease expenses $ 100 100 92
Lease termination year 2019    
Moncks Corner [Member]      
Commitments And Contingencies Disclosure [Line Items]      
Ground lease expenses $ 121 121 87
Lease termination year 2040    
Devine Street [Member]      
Commitments And Contingencies Disclosure [Line Items]      
Ground lease expenses $ 250 $ 251 $ 180
Lease termination year 2035