The ratio applied to the exchange of class B common stock in the Reorganization Transactions.

No definition available.

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- Definition

Represents the number of shares of common stock issued to certain directors, officers and employees.

+ References

No definition available.

+ Details

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- Definition

Represents the number of shares of common stock issued to the Exchanging Existing Owners.

+ References

No definition available.

+ Details

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- Definition

Represents the number of shares of common stock issued to the investors.

+ References

No definition available.

+ Details

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- Definition

Represents the number of shares of common stock issued as a result of the exercise of the underwriter's over-allotment option.

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
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- Definition

Represents the number of classes of membership interests prior to the Reorganization Transactions.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of limited partnership unit issued for each share to the Exchanging Existing Owners.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Represents the number of units held by the Continuing the Company Limited Partners.

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of units held by the general partner.

+ References

No definition available.

+ Details

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Namespace Prefix:	ladr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Represents the percentage of cash saving in income tax benefits available for the reporting entity under the tax receivable agreement.

+ References

No definition available.

+ Details

Name:	ladr_PercentageOfApplicableCashSavingInIncomeTaxAvailableForEntity
Namespace Prefix:	ladr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of cash saving in income tax benefits distributable to unitholders of predecessor that choose to exchange their interests in predecessor and Class B shares of the reporting entity into Class A shares of the reporting entity under the tax receivable agreement.

+ References

No definition available.

+ Details

Name:	ladr_PercentageOfApplicableCashSavingInIncomeTaxDistributableToSpecifiedUnitholders
Namespace Prefix:	ladr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Real Estate Investment Trust, Ownership Restriction, Percentage of Outstanding Capital Stock

+ References

No definition available.

+ Details

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Namespace Prefix:	ladr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the shares received by Exchanging Existing Owners in lieu of limited partnership units and shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	ladr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of limited partner units outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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ORGANIZATION AND OPERATIONS (Details) $ / shares in Units, $ in Millions		11 Months Ended	12 Months Ended
	Feb. 11, 2014 USD ($) shares	Dec. 31, 2014	Dec. 31, 2016 shares	Dec. 31, 2015 shares	Feb. 10, 2014 Class_of_Stock $ / shares
ORGANIZATION AND OPERATIONS
Number of classes of membership interests prior to the Reorganization Transactions \| Class_of_Stock					3
Share price used in the conversion of the three classes of membership (in dollars per share) \| $ / shares					$ 17.00
Ownership restriction, maximum percentage of outstanding capital stock			9.80%
Percentage of applicable cash saving in income tax distributable to specified unitholders		85.00%	85.00%
Percentage of applicable cash saving in income tax available for the entity		15.00%	15.00%
Class A common stock
ORGANIZATION AND OPERATIONS
Shares issued to the investors	15,237,500
Shares sold as a result of the exercise of the underwriter's over-allotment option	1,987,500
Net proceeds after deducting fees and expenses associated with the IPO \| $	$ 238.5
Shares issued to certain directors, officers and employees	1,687,513
Shares outstanding	50,597,205		71,586,170	55,209,849
Shares issued to the Exchanging Existing Owners	33,672,192
Class B common stock
ORGANIZATION AND OPERATIONS
Shares outstanding	48,537,414		38,002,344	44,055,987
LCFH
ORGANIZATION AND OPERATIONS
Percentage of investment of operating partner	51.00%
Units outstanding	99,134,619
Units held by company	50,597,205
Units held by the Continuing the Company Limited Partners	48,537,414
LCFH \| Class A common stock
ORGANIZATION AND OPERATIONS
Shares received by Exchanging Existing Owners in lieu of any or all LP Units and shares of Class B common stock	33,672,192
Number of LP unit for each share issued to the Exchanging Existing Owners	1
Stock exchange ratio	1
Series REIT
ORGANIZATION AND OPERATIONS
Percentage of investment of operating partner	51.90%
Limited partners ownership interest (in percent)	48.10%
Series REIT \| LCFH
ORGANIZATION AND OPERATIONS
Ownership interest in subsidiaries (in percent)	100.00%
Series TRS \| LCFH
ORGANIZATION AND OPERATIONS
Ownership interest in subsidiaries (in percent)	100.00%
LCFH \| LCFH
ORGANIZATION AND OPERATIONS
Ownership interest in LCFH			65.30%