REAL ESTATE AND RELATED LEASE INTANGIBLES, NET - Schedule of Depreciation and Amortization Expense on Real Estate (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Real Estate [Abstract]
Depreciation expense	$ 18,034,142us-gaap_Depreciation	$ 13,150,757us-gaap_Depreciation	$ 1,148,419us-gaap_Depreciation
Amortization expense	10,237,716us-gaap_AmortizationOfDeferredCharges	7,816,507us-gaap_AmortizationOfDeferredCharges	1,944,892us-gaap_AmortizationOfDeferredCharges
Total real estate depreciation and amortization expense	28,271,858us-gaap_DepreciationAndAmortization	20,967,264us-gaap_DepreciationAndAmortization	3,093,311us-gaap_DepreciationAndAmortization
Depreciation on corporate fixed assets	$ 175,579ladr_DepreciationOnCorporateFixedAssets	$ 547,308ladr_DepreciationOnCorporateFixedAssets	$ 547,308ladr_DepreciationOnCorporateFixedAssets

Represents the amount of depreciation on corporate fixed assets that reflects the allocation of the cost of tangible assets over the assets useful lives. Includes production and non-production related depreciation.

No definition available.

+ Details

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

- Definition

The amount of amortization of deferred charges applied against earnings during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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Period Type:	duration

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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- Details

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