Variable Interest Entities (Details Textual) $ in Thousands	Dec. 31, 2021 USD ($) apartment_home	Dec. 31, 2020 USD ($)
Schedule Of Investment Income Reported Amounts By Category [Line Items]
Mezzanine investment	$ 337,797	$ 307,362
San Diego Communities [Member]
Schedule Of Investment Income Reported Amounts By Category [Line Items]
Number of apartment communities | apartment_home	4
Mezzanine investment	$ 13,000	$ 12,800
Financial Guarantee [Member]
Schedule Of Investment Income Reported Amounts By Category [Line Items]
Customary guarantees	$ 168,400