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MORTGAGE LOAN RECEIVABLES - Schedule of Mortgage Loans (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2015 | 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) | (3,100) | $ (3,400) | $ (2,950) | $ (2,800) | $ (2,500)
Carrying Value | 2,128,343 | 1,939,008 |  |  |  |
Mortgage loan receivables held for investment, at amortized cost |  |  |  |  |  |
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 |  |  |  |
Weighted Average Yield (as a percent) | 7.61% | 7.33% |  |  |  |
Remaining Maturity (years) | 1 year 6 months 29 days | 1 year 11 months 15 days |  |  |  |
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 |  |  |  |
Weighted Average Yield (as a percent) | 4.15% | 4.31% |  |  |  |
Remaining Maturity (years) | 7 years 7 months 6 days | 9 years 8 months 19 days |  |  |  |

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- Definition Amount of the contractual principal due as of the balance sheet date of the mortgage loan (face amount). + References No definition available. + Details
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- Definition Represents the remaining maturity period of mortgage loans. + References No definition available. + Details
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- Definition Mortgage Loans on Real Estate, Gross, Commercial and Consumer, Net + References No definition available. + Details
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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 + Details
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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 + Details
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- Definition The stated interest rate on the mortgage loan receivable or the weighted average interest rate on a group of loans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 + Details
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- 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 No definition available. + Details
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