Derivative Instruments and Hedging Activities (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) instrument	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) instrument	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Total return swap income	$ 690,000	$ 1,882,000	$ 2,544,000	$ 6,709,000
Unsecured debt
Derivative [Line Items]
Debt instrument face amount	300,000,000		300,000,000
Multifamily Housing Mortgage Revenue Bonds
Derivative [Line Items]
Bond subject to interest rate caps	$ 223,000,000		$ 223,000,000
Interest Rate Swap | Unsecured debt
Derivative [Line Items]
Interest rate	4.20%		4.20%
Total Return Swap, Callable
Derivative [Line Items]
Total return swap income	$ 700,000	$ 1,900,000	$ 2,500,000	$ 6,700,000
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative, notional amount	300,000,000		300,000,000
Derivative asset	11,200,000		11,200,000		$ 5,600,000
Not Designated as Hedging Instrument | Total Return Swap, Callable
Derivative [Line Items]
Derivative, notional amount	223,000,000		223,000,000
Derivative, fair value, net	$ 0		$ 0		$ 0
Not Designated as Hedging Instrument | Total Return Swap, Callable | Multifamily Housing Mortgage Revenue Bonds
Derivative [Line Items]
Number of derivative instruments | instrument	4		4