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MORTGAGE LOAN RECEIVABLES - Mortgage Loan Receivables by Loan Type (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	$ 2,144,704		$ 1,954,878
Provision for loan losses	(3,550)	$ (3,400)	(3,100)	$ (2,950)	$ (2,800)	$ (2,500)
Carrying Value	2,128,343		1,939,008
First mortgage loan, held for sale
Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	333,488		417,955
Carrying Value	333,531		417,955
Mortgage loan receivables held for sale
Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	333,488		417,955
Carrying Value	333,531		417,955
First mortgage loan, held for investment
Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	1,524,080		1,373,476
Carrying Value, Gross	1,512,731		1,361,754
Mezzanine loan
Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	287,136		163,447
Carrying Value, Gross	285,631		162,399
Mortgage loan receivables held for investment
Mortgage Loans on Real Estate [Line Items]
Outstanding Face Amount	1,811,216		1,536,923
Carrying Value, Gross	1,798,362		1,524,153
Provision for loan losses	(3,550)		(3,100)
Carrying Value	$ 1,794,812		$ 1,521,053

X

- Definition

Amount of the contractual principal due as of the balance sheet date of the mortgage loan (face amount).

+ References

No definition available.

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- Definition

The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 944



-SubTopic 310



-Section 45



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=6873192&loc=d3e21338-158488

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- Definition

Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 942



-SubTopic 210



-Section S99



-Paragraph 1



-Subparagraph (SX 210.9-03.7(a))



-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 944



-SubTopic 210



-Section S99



-Paragraph 1



-Subparagraph (SX 210.7-03.1(c))



-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 310



-SubTopic 10



-Section 50



-Paragraph 3



-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5066-111524

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- Definition

The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 944



-SubTopic 210



-Section S99



-Paragraph 1



-Subparagraph (SX 210.7-03.1(c))



-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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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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