Gain (Loss) on Settlement of Loans Through Foreclosure

No definition available.

Name:	ladr_GainLossonSettlementofLoansThroughForeclosure
Namespace Prefix:	ladr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of Mortgage Loans Receivable

+ References

No definition available.

+ Details

Name:	ladr_NumberOfMortgageLoansReceivable
Namespace Prefix:	ladr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Real Estate Acquired Through Foreclosure, Cash Received

+ References

No definition available.

+ Details

Name:	ladr_RealEstateAcquiredThroughForeclosureCashReceived
Namespace Prefix:	ladr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Real Estate Acquired Through Foreclosure, Discount Rate

+ References

No definition available.

+ Details

Name:	ladr_RealEstateAcquiredThroughForeclosureDiscountRate
Namespace Prefix:	ladr_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Real Estate Acquired Through Foreclosure, Net Basis

+ References

No definition available.

+ Details

Name:	ladr_RealEstateAcquiredThroughForeclosureNetBasis
Namespace Prefix:	ladr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Real Estate Acquired Through Foreclosure, Number of Properties Acquired

+ References

No definition available.

+ Details

Name:	ladr_RealEstateAcquiredThroughForeclosureNumberOfPropertiesAcquired
Namespace Prefix:	ladr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Real Estate Acquired Through Foreclosure, Terminal Capitalization Rate

+ References

No definition available.

+ Details

Name:	ladr_RealEstateAcquiredThroughForeclosureTerminalCapitalizationRate
Namespace Prefix:	ladr_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Real Estate Acquired Through Foreclosure, Type Of Unit Acquired

+ References

No definition available.

+ Details

Name:	ladr_RealEstateAcquiredThroughForeclosureTypeOfUnitAcquired
Namespace Prefix:	ladr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Real Estate Properties, Ownership Interest

+ References

No definition available.

+ Details

Name:	ladr_RealEstatePropertiesOwnershipInterest
Namespace Prefix:	ladr_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 30
-Paragraph 8
-SubTopic 30
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479637/805-30-30-8

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-SubTopic 30
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479581/805-30-50-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 30
-Paragraph 7
-SubTopic 30
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479637/805-30-30-7

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

+ Details

Name:	us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Value of input used to measure real estate owned by financial institution by financial institution which is not directly related to its business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_OtherRealEstateOwnedMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11

+ Details

Name:	us-gaap_RealEstateAcquiredThroughForeclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_StatementGeographicalAxis=ladr_NewYorkNYMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=ladr_MixedUseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_MultifamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RealEstateAcquiredInSatisfactionOfDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_RetailSiteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_ApartmentBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=ladr_CondosMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputCapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=ladr_CondosResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=ladr_CondosRetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=ladr_PittsburghPAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=ladr_MiamiFloridaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_HotelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=ladr_StillwaterOklahomaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=ladr_SchaumburgIllinoisMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=ladr_HoustonTexasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

REAL ESTATE AND RELATED LEASE INTANGIBLES, NET - Schedule of Real Estate Properties Acquired (Details)	1 Months Ended						12 Months Ended
	Dec. 31, 2023 USD ($) loans property	Nov. 30, 2023 USD ($)	Sep. 30, 2023 USD ($) property	Nov. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Feb. 28, 2021 USD ($)	Dec. 31, 2023 USD ($) loans property	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Feb. 28, 2022 USD ($) security	Aug. 31, 2021 USD ($)
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure					$ 102,202,000				$ 102,202,000
Total real estate acquisitions							$ 87,526,000	$ 24,822,000
Realized (gain) loss on disposition of loan							0	0	(26,000)
Provision for (release of) loan loss reserves, net							$ 25,096,000	$ 3,711,000	(8,713,000)
Net earnings (loss)									0
New York, NY
Business Acquisition [Line Items]
Number of properties acquired \| property	1						1
New York, NY \| Mixed Use
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure			$ 30,400,000
Ownership Interest			100.00%
New York, NY \| Multifamily
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure			$ 30,400,000
Number of properties acquired \| property			4
Terminal capitalization rate			5.50%
New York, NY \| Multifamily \| Real Estate Acquired in Satisfaction of Debt
Business Acquisition [Line Items]
Realized (gain) loss on disposition of loan			$ 0
New York, NY \| Retail
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure	$ 22,647,000						$ 22,647,000
Ownership Interest	100.00%						100.00%
Terminal capitalization rate	5.25%
Number of mortgage loans receivable \| loans	2						2
New York, NY \| Retail \| Real Estate Acquired in Satisfaction of Debt
Business Acquisition [Line Items]
Realized (gain) loss on disposition of loan	$ 0
New York, NY \| Apartments
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure										$ 15,436,000
Ownership Interest										100.00%
New York, NY \| Condos
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure										$ 15,400,000
New York, NY \| Condos \| Measurement Input, Cap Rate
Business Acquisition [Line Items]
Measurement input										0.055
New York, NY \| Condos, Residential
Business Acquisition [Line Items]
Type of real estate unit acquired via foreclosure \| security										1
New York, NY \| Condos, Retail
Business Acquisition [Line Items]
Type of real estate unit acquired via foreclosure \| security										1
Pittsburgh, PA \| Multifamily
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure		$ 34,479,000
Ownership Interest		100.00%
Terminal capitalization rate		6.00%
Pittsburgh, PA \| Multifamily \| Real Estate Acquired in Satisfaction of Debt
Business Acquisition [Line Items]
Realized (gain) loss on disposition of loan		$ 0
Miami, FL \| Hotel
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure						$ 43,750,000
Ownership Interest						100.00%
Realized (gain) loss on disposition of loan						$ (25,800)
Real estate acquired through foreclosure, net basis						$ 45,100,000
Provision for (release of) loan loss reserves, net									1,200,000
Stillwater, OK \| Apartments
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure											$ 20,452,000
Ownership Interest											80.00%
Schaumburg, IL \| Hotel
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure					$ 38,000,000				$ 38,000,000
Ownership Interest					100.00%				100.00%
Terminal capitalization rate									8.00%
Real estate acquired through foreclosure, net basis					$ 38,000,000				$ 38,000,000
Discount rate									10.00%
Houston, TX \| Office
Business Acquisition [Line Items]
Purchase Price/Fair Value on the Date of Foreclosure				$ 9,386,000
Ownership Interest				100.00%
Terminal capitalization rate				9.50%
Real estate acquired through foreclosure, net basis				$ 10,300,000
Real estate acquired through foreclosure, cash received				$ 900,000
Discount rate				10.50%
Houston, TX \| Hotel \| Real Estate Acquired in Satisfaction of Debt
Business Acquisition [Line Items]
Realized (gain) loss on disposition of loan				$ 0	$ 0