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MORTGAGE AND OTHER INDEBTEDNESS, NET - Fixed Rate Debt (Details) - USD ($) |  | 1 Months Ended | 2 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Sep. 30, 2019 | Aug. 31, 2019 | Apr. 30, 2019 | Sep. 30, 2018 | Jan. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2017
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  |  |  |  |  | $ 102,446,000 |  |  | $ 1,802,000
Principal Balance Repaid | $ 35,470,000 |  |  |  |  |  |  |  | $ 17,278,000 |  |
Hickory Point Mall |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  | 5.85% |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  | $ 27,446,000 |  |  |  |  |  |  |
The Outlet Shoppes At El Paso |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  | 5.10% |  |  |  |  | 5.10% |  |  |
Amount Financed or Extended |  |  | $ 75,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  | 4.73% |  |  | 4.73% |  |
Principal Balance Repaid |  |  |  |  |  | $ 6,525,000 |  |  |  |  |
Honey Creek Mall |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  | 8.00% |  |  |  |  |  |
Principal Balance Repaid |  |  |  |  | $ 23,539,000 |  |  |  |  |  |
The Terrace |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage | 7.25% | 7.25% |  |  |  |  |  |  |  | 7.25% |
Principal Balance Repaid |  | $ 11,931,000 |  |  |  |  |  |  |  |  |
Kirkwood Mall |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  | 5.75% |  |  |  |
Principal Balance Repaid |  |  |  |  |  |  | $ 37,295,000 |  |  |  |
Fixed Rate Operating Loans |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-average remaining term to maturity |  |  |  |  |  |  |  |  |  | 2 years 1 month 6 days |
Minimum | Fixed Rate Operating Loans |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate of debt bearing fixed interest (as a percent) | 4.36% | 4.36% |  |  |  |  |  |  |  | 4.36% |
Maximum | Fixed Rate Operating Loans |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate of debt bearing fixed interest (as a percent) | 6.50% | 6.50% |  |  |  |  |  |  |  | 6.50% |

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + 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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