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Consolidated Agency Multifamily Loans - Schedule of Product Types and Characteristics of Multifamily Loans (Details) - Multifamily securities $ in Thousands | 12 Months Ended
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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%

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- Definition Amount of principal due on loans that have been delinquent thirty to eighty-nine days as of the balance sheet date. + References No definition available. + Details
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- Definition Interest rate of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 29 -Paragraph Column B -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 948 -SubTopic 310 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479851/948-310-S99-1 + Details
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- Definition This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (a) -Paragraph 4 -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-4 + Details
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