Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation - Restricted and Unrestricted Shares with Market Conditions (Details)

v3.19.3.a.u2
Stock Based Compensation - Restricted and Unrestricted Shares with Market Conditions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighting for performance measurement on FTSE NAREIT Diversified Index 50.00%    
Relative Peer TSR | Restricted Share Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Date Fair Value $ 184 $ 203 $ 222
Unamortized Value 138 85 44
Relative Peer TSR | Unrestricted Share Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Date Fair Value 552 608 666
Unamortized Value 368 171 0
Absolute/Index TSR | Restricted Share Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Date Fair Value [1] 201 230 100
Unamortized Value [1] 151 96 20
Absolute/Index TSR | Unrestricted Share Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant Date Fair Value [1] 602 690 299
Unamortized Value [1] $ 401 $ 194 $ 0
LTIP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighting for performance measurement based on select peer companies 0.50    
Weighting for performance measurement on FTSE NAREIT Diversified Index 50.00%    
Performance evaluated on absolute total shareholder return 50.00%   50.00%
Performance evaluated on relative total shareholder return 50.00%   50.00%
[1]
(1)
The performance conditions for the 2019 and 2018 awards were evaluated based on 50% on TSR relative to a defined population of peer companies and 50% on TSR relative to the FTSE NAREIT Diversified Index. The performance condition for the 2017 awards was evaluated based 50% on absolute TSR and 50% on relative TSR.