Consolidated Agency Multifamily Loans - Schedule of Product Types and Characteristics of Multifamily Loans (Details) - Multifamily securities $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	28	28
Total Principal	$ 438,868	$ 447,193
30-89 Days DQ	0	0
90+ Days DQ	0	0
$10,001 to $20,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance, minimum	10,001	10,001
Loan Balance, maximum	$ 20,000	$ 20,000
Number of Loans | loan	26	24
Total Principal	$ 391,383	$ 358,419
30-89 Days DQ	0	0
90+ Days DQ	$ 0	$ 0
$10,001 to $20,000 | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	4.25%	4.25%
$10,001 to $20,000 | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	4.25%	4.25%
$20,001 to $30,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan Balance, minimum	$ 20,001	$ 20,001
Loan Balance, maximum	$ 30,000	$ 30,000
Number of Loans | loan	2	4
Total Principal	$ 47,485	$ 88,774
30-89 Days DQ	0	0
90+ Days DQ	$ 0	$ 0
$20,001 to $30,000 | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	4.25%	4.25%
$20,001 to $30,000 | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	4.25%	4.25%