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SECURED FINANCING - Mortgage Loans Payable (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Debt Instrument [Line Items] |  |
Variable interest rate | 91.00% | 88.00%
Commercial Mortgage Loan |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | $ 485,657 | $ 511,056
Mortgage Principal | 491,435 | 516,834
Joint Ventures | Commercial Mortgage Loan |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | 316,535 | 316,275
Mortgage Principal | $ 318,625 | $ 318,664
Joint Ventures | Commercial Mortgage Loan | Minimum |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.03% | 4.03%
Joint Ventures | Commercial Mortgage Loan | Maximum |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.96% | 4.96%
Joint Ventures | Commercial Mortgage Loan | LIBOR |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | $ 16,003 | $ 16,125
Mortgage Principal | $ 16,325 | $ 16,125
Variable interest rate | 2.15% | 2.75%
Virginia | Commercial Mortgage Loan |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | $ 83,412 | $ 95,827
Mortgage Principal | $ 85,193 | $ 97,667
Virginia | Commercial Mortgage Loan | Minimum |  |
Debt Instrument [Line Items] |  |
Interest Rate | 2.34% | 2.75%
Virginia | Commercial Mortgage Loan | Maximum |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.55% | 4.96%
Texas | Commercial Mortgage Loan |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | $ 31,799 | $ 32,189
Mortgage Principal | $ 33,311 | $ 33,735
Interest Rate | 3.28% | 3.28%
Utah | Commercial Mortgage Loan |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | $ 7,104 | $ 9,703
Mortgage Principal | $ 7,122 | $ 9,706
Interest Rate | 3.69% | 3.69%
Utah | Commercial Mortgage Loan | LIBOR |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | $ 9,706 | $ 7,279
Mortgage Principal | $ 9,706 | $ 7,201
Variable interest rate | 3.50% | 3.50%
Minnesota | Commercial Mortgage Loan |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | $ 13,292 | $ 13,438
Mortgage Principal | $ 13,326 | $ 13,473
Interest Rate | 3.69% | 3.69%
Tennessee | Commercial Mortgage Loan |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value |  | $ 12,328
Mortgage Principal |  | $ 12,350
Interest Rate |  | 4.01%
Wisconsin | Commercial Mortgage Loan |  |
Debt Instrument [Line Items] |  |
Mortgage Carrying Value | $ 7,806 | $ 7,892
Mortgage Principal | $ 7,827 | $ 7,913
Interest Rate | 3.69% | 3.69%

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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