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Share Based Compensation - Summary of Future Compensation Expense (Details) - Time Based Restricted Stock Awards
$ in Thousands
Dec. 31, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
2020 $ 2,811
2021 1,352
2022 150
Total 4,313
Employees  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
2020 2,527
2021 1,352
2022 150
Total 4,029
Non-Employee Trustees  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
2020 284
Total $ 284