Debt Obligations - Summary of Debt Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Deferred financing costs	$ (1,020)	$ (1,160)
Total debt obligations, net of deferred costs	168,913	170,278
Mortgages payable
Debt Instrument [Line Items]
Debt, long-term and short-term debt, combined amount	132,533	134,038
Junior subordinated notes
Debt Instrument [Line Items]
Debt, long-term and short-term debt, combined amount	$ 37,400	$ 37,400