Real Estate Assets - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 ft²	Dec. 31, 2021 lease	Dec. 31, 2021	Dec. 31, 2021 number_of_properties	Dec. 31, 2021 unit	Dec. 31, 2020 ft²	Dec. 31, 2020	Dec. 31, 2020 number_of_properties	Dec. 31, 2020 unit
Business Acquisition
Intangible Assets, Gross (Excluding Goodwill)		$ 225,800,000
Number of Real Estate Properties					109	10	1			14	2
Number of units in real estate property | unit								1,278				1,293
Revenues	$ 451,142,000	501,185,000	$ 470,427,000
Net Income contributed to consolidated results	20,532,000	(181,603,000)	(7,458,000)
Gains (Losses) on Sales of Investment Real Estate	21,109,000	23,456,000	0
Finite-Lived Intangible Assets, Accumulated Amortization	166,214,000	169,718,000
Finite-Lived Intangible Liabilities	70,900,000
finite lived intangible liabilities accumulated amortization	36,300,000
amortization of purchase option termination fee income	9,712,000	6,536,000	$ 9,111,000
Restricted cash, capital expenditures and property improvements	10,800,000
Multifamily Acquisitions [Member]
Business Acquisition
Net assets acquired	336,100,000	276,900,000
Business Combination, Consideration Transferred	$ 335,166,000	$ 280,488,000
New Market Properties [Member]
Business Acquisition
Number of Real Estate Properties						54				54
Area of Real Estate Property | ft²				6,210,778					6,208,278