Derivative Instruments and Hedging Activities (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) instrument	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) instrument	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Derivative [Line Items]
Total return swap income	$ 1,882,000	$ 2,660,000	$ 6,709,000	$ 8,137,000
Multifamily Housing Mortgage Revenue Bonds
Derivative [Line Items]
Bond subject to interest rate caps	$ 223,800,000		$ 223,800,000
Interest Rate Swap | Term Loan
Derivative [Line Items]
Interest rate	4.20%		4.20%
Total Return Swap, Callable
Derivative [Line Items]
Total return swap income	$ 1,900,000	$ 2,700,000	$ 6,700,000	$ 8,100,000
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative asset	6,200,000		6,200,000
Derivative liability					$ 0
Not Designated as Hedging Instrument | Total Return Swap, Callable
Derivative [Line Items]
Derivative, notional amount	223,800,000		223,800,000
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