Fair Value of Financial Instruments (Carrying Amounts and Fair Values of Debt) (Details) - Significant Unobservable Inputs Level 3 - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Gross mortgage notes payable and mortgage premium and discounts, net | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	$ 587,546	$ 590,425
Gross mortgage notes payable and mortgage premium and discounts, net | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	577,120	594,348
Credit Facility | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	150,000	150,000
Credit Facility | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	148,954	148,817
Fannie Credit Facility | Credit Facility | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	354,655	355,045
Fannie Credit Facility | Credit Facility | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, fair value disclosure	$ 351,223	$ 350,710