Numbers of operating partnership units issued or issuable in consideration for the business combination.

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The amount of mortgage loans converted to mezzanine loans during the reporting period.

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No definition available.

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Debt Instrument, Maturity Date, Length of Extension Period

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No definition available.

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Debt Instrument, Number of Extension Options

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No definition available.

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Represents information pertaining to the percentage of indirect ownership in a business.

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No definition available.

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Represents the percentage of noncontrolling interest in the equity method investment acquired by the entity.

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No definition available.

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- Definition

Minimum variable interest rate for loans receivable.

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No definition available.

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Represents the fixed interest rate on the mortgage loan receivable or the weighted average interest rate on a group of loans.

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No definition available.

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Number of Entities

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No definition available.

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The number of multifamily properties renovated.

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No definition available.

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Number of Officers

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No definition available.

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Balance Type:	na
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Represents the maximum percentage of ownership interest of the Company's common stock allowed under the company's charter.

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No definition available.

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Represents the cash outflow during the reporting period in respect of payments for loans and investments funded and purchased by the reporting entity.

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No definition available.

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Amount of Payments To Purchase Property.

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No definition available.

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The percentage of equity participation interest.

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No definition available.

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Represents information pertaining to percentage of maximum loss-sharing obligation unpaid principal balance.

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No definition available.

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Represents the percentage of outstanding membership interest of a related party in another related party.

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No definition available.

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The minimum amount the entity agreed to fund under the related party commitment.

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No definition available.

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Represents the percentage of ownership of common stock or equity participation owned by related party.

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Represent information pertaining to related party, percentage of management.

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Represents the number of bridge loan originated with relevant mortgage property owned by related parties.

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No definition available.

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Represents the percentage of voting power held by a related party.

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The amount of reimbursements made to related party during the period for flights chartered by the company's executives.

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No definition available.

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Represents the number of common shares held by a related party.

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The upsized amount the entity agreed to fund under the related party commitment.

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No definition available.

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Amount of decrease in 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, from collection of principal.

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Amount of contractual principal due at origination 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.

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Amount of obligations incurred and payable classified as other.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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- Definition

All amounts that, per contract, are due to the servicer in exchange for servicing the financial asset and would no longer be received by a servicer if the beneficial owners of the serviced assets (or their trustees or agents) were to exercise their actual or potential authority under the contract to shift the servicing to another servicer. Depending on the servicing contract, those fees may include some or all of the difference between the interest rate collected on the asset being serviced and the rate to be paid to the beneficial owners of the asset.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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- Definition

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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- Definition

Amount of realized and unrealized gain (loss) on investment.

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

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- Definition

The fair value of loans assumed in noncash investing or financing activities.

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Percentage added to reference rate used to compute variable rate on loan receivable.

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No definition available.

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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The number of real estate properties owned as of the balance sheet date.

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No definition available.

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Amount due from parties in nontrade transactions, classified as other.

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The percentage charged for managing real estate properties.

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Agreements and Transactions with Related Parties - Other Related Party (Details) $ in Thousands	1 Months Ended	3 Months Ended			12 Months Ended
	May 30, 2023 USD ($) extension	Mar. 31, 2024 USD ($) entity shares	Jun. 30, 2023	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) property	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) loan property	Dec. 31, 2017 USD ($)	Dec. 31, 2015 USD ($)	Nov. 30, 2023 USD ($)	May 31, 2023 USD ($) officer	Apr. 30, 2023 USD ($)
Agreements and Transactions with Related Parties
Due from related party		$ 104,365			$ 64,421
Due to related party		14,159			$ 13,799
Interest income		321,292		$ 327,947
Investment made		313,557		380,633
Servicing revenue		$ 48,157		44,981
Indirect ownership percentage		12.30%			12.30%
Arbor Residential Investor LLC
Agreements and Transactions with Related Parties
Indirect ownership percentage		9.20%			9.20%
Lexford Portfolio
Agreements and Transactions with Related Parties
Distribution received				4,700
AMAC Holdings III LLC
Agreements and Transactions with Related Parties
Gain (loss) on investments		$ (500)		(400)
Distribution received				600
Maturity date of March 2025 \| SOFR \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Base spread, percentage						5.50%
Bridge loans
Agreements and Transactions with Related Parties
Variable rate, spread			3.40%
Bridge loan, six multifamily properties \| Other Related Party Transactions
Agreements and Transactions with Related Parties
UPB converted to a mezzanine loan									$ 2,000
Related Party
Agreements and Transactions with Related Parties
Amount invested							$ 4,200
Related Party \| LLC
Agreements and Transactions with Related Parties
Ownership interest, percentage							49.30%
Related Party \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Reimbursement for flights chartered by the company's executives		300		200
Related Party \| Other Related Party Transactions \| AMAC III
Agreements and Transactions with Related Parties
Interest income		800		700
Amount invested		$ 25,900							$ 30,000
Ownership interest, percentage									18.00%
Related Party \| Other Related Party Transactions \| Lexford Portfolio
Agreements and Transactions with Related Parties
Management fee, percentage of gross revenues of underlying properties		4.75%
Related Party \| Commercial Mortgage Backed Security
Agreements and Transactions with Related Parties
Loans assumed							$ 26,000
Related Party \| Residential mortgage banking business \| Other Related Party Transactions \| ACM
Agreements and Transactions with Related Parties
Noncontrolling interest in equity method investment acquired (as a percent)												50.00%
Related Party \| Residential mortgage banking business \| Other Related Party Transactions \| Noncontrolling Interest
Agreements and Transactions with Related Parties
Gain (loss) on investments		$ 1,600		900
Indirect ownership percentage		12.30%
Related Party \| Residential mortgage banking business \| Other Related Party Transactions \| ACM
Agreements and Transactions with Related Parties
Acquisition purchase price												$ 9,600
Related Party \| ACM Acquisition \| Other Related Party Transactions \| ACM
Agreements and Transactions with Related Parties
Number of shares held by related party (in shares) \| shares		2,535,870
OP units hold as part of acquisition (in shares) \| shares		10,615,085
Aggregate percentage of voting power held by related party		6.40%
Related Party \| Multifamily \| Fannie Mae Mortgage \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount											$ 46,900
Percentage of ownership interest of related party in the entity											17.60%
Percentage of maximum loss-sharing obligation unpaid principal balance											5.00%
Servicing revenue		$ 100		100
Related Party \| Retail property
Agreements and Transactions with Related Parties
Property purchased							32,500
Related Party \| Maturity Date April 2030 \| Multifamily \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Number of properties owned \| property								2
Related Party \| Maturity date of August 2023 \| One multifamily property \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount								$ 35,400
Related Party \| Maturity date of March 2030 \| Private Label \| Other Related Party Transactions \| Lexford Portfolio
Agreements and Transactions with Related Parties
Principal amount								34,600
Related Party \| Preferred equity investments \| Single-Family Rental \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Investment made								$ 4,600
Related Party \| Preferred equity investments \| Matures in April 2023 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Fixed rate of interest								12.00%
Related Party \| Preferred equity investments \| Maturity Date April 2030 \| Multifamily \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Equity investment								$ 3,400
Related Party \| Preferred equity investments \| Maturity Date June 2027
Agreements and Transactions with Related Parties
Equity investment		10,000
Related Party \| Mezzanine Loans \| Single-Family Rental \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Interest income		100		100
Related Party \| Mezzanine Loans \| Maturity Date April 2030 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Fixed rate of interest								9.00%
Related Party \| Bridge loans \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Equity participation interest (as a percentage)								18.90%
Related Party \| Bridge loans \| Single-Family Rental \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Loan committed		37,000
Investment made								$ 3,500
Loan committed upsized													$ 39,900		$ 38,800
Related Party \| Bridge loans \| Maturity Date December 2025
Agreements and Transactions with Related Parties
Interest income		300
Related Party \| Bridge loans \| Maturity Date December 2025 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount														$ 56,900
Loan committed	$ 14,900
Number of officers making minority equity investments \| officer														2
Equity investment														$ 500
Equity participation interest (as a percentage)														4.00%
Number of extension options \| extension	2
Length of extension option														6 months
Related Party \| Bridge loans \| Maturity Date December 2025 \| SOFR \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Base spread, percentage														5.50%
SOFR floor, percentage	3.25%
Related Party \| Bridge loans \| Maturity date of March 2025
Agreements and Transactions with Related Parties
Interest income		200		0
Related Party \| Bridge loans \| Maturity date of March 2025 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount						$ 46,200
Loan committed		6,500
Interest income		300		100
Related Party \| Bridge loans \| Maturity date of March 2025 \| SOFR \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Equity participation interest (as a percentage)						70.00%
Related Party \| Bridge loans \| Maturity date of May 2025 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount						$ 67,100
Loan committed		6,500
Interest income		100
Related Party \| Bridge loans \| Maturity date of May 2025 \| SOFR \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Equity participation interest (as a percentage)						2.25%
Base spread, percentage						4.63%
SOFR floor, percentage						0.25%
Related Party \| Bridge loans \| Maturity date of May 2025 \| Single-Family Rental \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Loan committed								30,500
Related Party \| Bridge loans \| Maturity date of May 2025 \| Maximum \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Interest income				100
Related Party \| Bridge loans \| Maturity date of March 2025, Committed February 2022 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount						$ 39,400
Loan committed		12,700
Related Party \| Bridge loans \| Maturity date of March 2025, Committed February 2022 \| London Interbank Offered Rate (LIBOR) 1 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Equity participation interest (as a percentage)						2.25%
Base spread, percentage						4.00%
SOFR floor, percentage						0.25%
Related Party \| Bridge loans \| Maturity date of March 2024 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Loan committed							$ 63,400
Interest income				1,400
Related Party \| Bridge loans \| Maturity date of March 2024 \| London Interbank Offered Rate (LIBOR) 1 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Base spread, percentage							3.75%
SOFR floor, percentage							0.25%
Related Party \| Bridge loans \| Maturity Date December 2023 \| Single-Family Rental \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Loan committed								$ 32,500
Related Party \| Bridge loans \| Matures in May 2023 \| London Interbank Offered Rate (LIBOR) 1 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Base spread, percentage								5.25%
SOFR floor, percentage								1.00%
Amount invested		36,700
Related Party \| Bridge loans \| Matures in April 2023 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Interest income		1,100		700
Related Party \| Bridge loans \| Maturity Date July 2023
Agreements and Transactions with Related Parties
Principal amount		35,000
Related Party \| Bridge loans \| Maturity date of August 2023 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Interest income		600		500
Percentage of ownership interest of related party in the entity										75.00%
Related Party \| Bridge loans \| Maturity Date Of June 2021 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount										$ 280,500
Number of bridge loans originated \| loan										12
Number of multifamily properties renovated \| property										72
Related Party \| Bridge loans \| Maturity Date Of June 2021 \| Other Related Party Transactions \| Lexford Portfolio
Agreements and Transactions with Related Parties
Base spread, percentage										4.00%
Distribution received				4,700
Paydowns of principal made by borrower									$ 250,000
Unsecured financing provided by an unsecured lender to certain parent entities of the property owners										$ 50,000
Related Party \| Bridge loan, one multifamily property \| Maturity date of August 2023 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount										$ 21,700
Related Party \| Bridge loan, one multifamily property \| Maturity date of August 2023 \| London Interbank Offered Rate (LIBOR) 1 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Variable rate, spread								3.50%
Related Party \| Bridge loan, several multifamily properties \| Maturity date of August 2023 \| London Interbank Offered Rate (LIBOR) 1 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Base spread, percentage										4.75%
SOFR floor, percentage										0.25%
Related Party \| Bridge loan, two multifamily properties \| Maturity Date April 2030 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount								$ 14,800
Percentage of ownership interest of related party in the entity								50.00%
Related Party \| AMAC III \| Mezzanine Loans \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount									7,000
Related Party \| AMAC III \| Bridge loan, one multifamily property \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Principal amount									$ 34,000
Related Party \| Lexford Portfolio \| Maturity date of March 2030 \| Private Label \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Fixed rate of interest								3.30%
Related Party \| Lexford Portfolio \| Bridge loans \| Maturity date December 2029 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Maximum exposure under guaranty		$ 500,000
Chief executive officer \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Percentage of our former manager's outstanding membership interest of related party in another related party		35.00%
Chief executive officer \| Minimum \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Ownership percentage limit of our common stock under company charter		5.00%
Chief executive officer \| Mezzanine Loans \| Maturity date of January 2024 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Fixed rate of interest									10.00%
Chief executive officer \| Bridge loan, six multifamily properties \| Maturity date of 2019 \| Minimum \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Percentage of ownership interest of related party in the entity									10.50%
Chief executive officer \| Bridge loan, six multifamily properties \| Maturity date of 2019 \| Maximum \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Percentage of ownership interest of related party in the entity									12.00%
Chief executive officer \| Bridge loan, six multifamily properties \| Maturity date of September 2019 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Interest income		$ 100		100
Immediate Family Member of Management or Principal Owner \| LLC
Agreements and Transactions with Related Parties
Percentage of ownership interest of related party in the entity							10.00%
Immediate Family Member of Management or Principal Owner \| Maturity date of March 2025 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Percentage of ownership interest of related party in the entity						10.00%
Immediate Family Member of Management or Principal Owner \| Maturity Date December 2023 \| Preferred equity interest financing agreement \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Interest income		$ 1,000
Immediate Family Member of Management or Principal Owner \| Preferred equity investments \| Maturity Date December 2023 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Fixed rate of interest								12.00%
Immediate Family Member of Management or Principal Owner \| Bridge loans \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Equity participation interest (as a percentage)								21.80%
Immediate Family Member of Management or Principal Owner \| Bridge loans \| Maturity Date December 2023 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Base spread, percentage								4.75%
Interest income				500
Immediate Family Member of Management or Principal Owner \| Bridge loans \| Maturity Date December 2023 \| London Interbank Offered Rate (LIBOR) 1 \| Other Related Party Transactions
Agreements and Transactions with Related Parties
SOFR floor, percentage								0.75%
Director \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Number of Kaufman Entities \| entity		2
Director \| Fannie Mae Mortgage \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Servicing revenue				$ 100
Loan purchased a multifamily apartment complex which assumed											$ 8,300
Percentage of ownership after transaction		3.60%
Director \| Ginkgo Investment Company LLC \| Other Related Party Transactions
Agreements and Transactions with Related Parties
Percentage of managing member											33.00%