Variable Interest Entities (Details) $ in Thousands	Jun. 30, 2021 USD ($) Property Entity Unit	Dec. 31, 2020 USD ($) Property Entity Unit
Net real estate	$ 4,748,088	$ 5,013,359
Cash and cash equivalents	59,401	44,214
Restricted cash	21,300	29,266
Other assets	555,189	576,026
Non-recourse property debt, net	3,064,803	3,628,236
Accrued liabilities and other	$ 570,040	$ 598,736
Variable Interest Entity, Primary Beneficiary [Member]
VIEs with interests in apartment communities | Entity	5	5
Number of owned and managed apartment communities in segments | Property	16	16
Number of apartment homes in apartment communities | Unit	5,369	5,369
Net real estate	$ 1,108,567	$ 1,125,315
Cash and cash equivalents	19,351	10,548
Restricted cash	2,100	8,818
Other assets	23,130	23,870
Non-recourse property debt, net	1,234,788	1,278,318
Accrued liabilities and other	$ 32,731	$ 34,038