Leases - Summary of Residential and Non-Residential Accounts Receivable and Straight-Line Receivable Balances (Details) - Other Assets [Member] - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Residential Leases [Member]
Operating Leased Assets [Line Items]
Resident/tenant accounts receivable balances	$ 42,126	$ 30,856
Allowance for doubtful accounts	(37,669)	(24,021)
Net receivable balances	4,457	6,835
Straight-line receivable balances	12,650	19,992
Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Resident/tenant accounts receivable balances	4,001	7,598
Allowance for doubtful accounts	(3,442)	(6,527)
Net receivable balances	559	1,071
Straight-line receivable balances	$ 12,759	$ 13,413