Credit Facilities, Net (Summary of Credit Facilities) (Details) $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2021 property	Dec. 31, 2021	Dec. 31, 2021 encumbered_property	Dec. 31, 2020 USD ($)
Line of Credit Facility [Line Items]
Number of properties		202		113
Outstanding balance	$ 502,051				$ 674,551
Effective interest rate			3.00%		3.29%
Credit Facilities
Line of Credit Facility [Line Items]
Outstanding balance	147,006				$ 319,376
Fannie Mae Master Credit Facilities | Credit Facilities
Line of Credit Facility [Line Items]
Number of properties | property		21
Outstanding balance	355,045				355,175
Fannie Mae Master Credit Facilities | Capital One Facility | Credit Facilities
Line of Credit Facility [Line Items]
Number of properties | property		11
Outstanding balance	212,417				$ 212,467
Effective interest rate			2.51%		2.60%
Debt instrument, collateral amount	346,200
Fannie Mae Master Credit Facilities | KeyBank Facility | Credit Facilities
Line of Credit Facility [Line Items]
Number of properties | property		10
Outstanding balance	142,628				$ 142,708
Effective interest rate			2.56%		2.65%
Debt instrument, collateral amount	255,000
Credit Facilities | Revolving Credit Facility
Line of Credit Facility [Line Items]
Number of properties | property		92
Outstanding balance	0				$ 173,674
Effective interest rate			0.00%		3.21%
Long-term debt, percentage bearing fixed interest, amount	50,000				$ 50,000
Term Loan | Credit Facilities
Line of Credit Facility [Line Items]
Outstanding balance	150,000				150,000
Deferred financing costs	(2,994)				(4,298)
Term Loan, net	$ 147,006				$ 145,702
Effective interest rate			4.11%		4.95%