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UNCONSOLIDATED AFFILIATES AND COST METHOD INVESTMENT (Repayments) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jul. 31, 2016 | Jun. 30, 2016 | Apr. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Principal Balance Repaid |  |  |  |  |  |  | $ 427,247 | $ 291,607 |
Mortgage loan |  |  |  |  |  |  | $ 1,802 | 0 | $ 0
Gulf Coast Town Center - Phase III |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate | 3.13% |  |  |  |  |  |  |  |
Principal Balance Repaid | $ 4,118 |  |  |  |  |  |  |  |
Renaissance Center - Phase I |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  | 5.61% |  |  |
Principal Balance Repaid |  |  |  |  |  | $ 31,484 |  |  |
Kentucky Oaks Mall Company |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  | 5.27% |  |  |  |  |
Principal Balance Repaid |  |  |  | $ 19,912 |  |  |  |  |
Kentucky Oaks Mall Company | Parent |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Principal Balance Repaid |  |  |  | $ 9,956 |  |  |  |  |
Governor’s Square Company |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  | 8.23% |  |  |  |  |  |
Principal Balance Repaid |  |  | $ 14,089 |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  |  |  |  | 47.50% |  |
Governor’s Square Company | Parent |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Principal Balance Repaid |  |  | $ 6,692 |  |  |  |  |  |
High Pointe Commons - Phase I |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  | 5.74% |  |  |  |  |  |
Principal Balance Repaid |  |  | $ 12,401 |  |  |  |  |  |
High Pointe Commons - PetCo |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  | 3.20% |  |  |  |  |  |
Principal Balance Repaid |  |  | $ 19 |  |  |  |  |  |
Joint venture, ownership percentage |  |  | 50.00% |  |  |  |  |  |
High Pointe Commons - Phase II |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  | 6.10% |  |  |  |  |  |
Principal Balance Repaid |  |  | $ 4,968 |  |  |  |  |  |
The Shops at Friendly Center |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  | 5.90% |  |
Principal Balance Repaid |  | $ 37,640 |  |  |  |  |  |  |
Mortgage loan |  | 60,000 |  |  |  |  |  |  |
Triangle Town Place |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  | 4.00% |  |
Principal Balance Repaid |  | $ 29,342 |  |  |  |  |  |  |
Triangle Town Center and Triangle Town Commons |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Mortgage loan |  |  |  |  |  |  |  | 141,126 |
Triangle Town Center and Triangle Town Commons | Parent |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Mortgage loan |  |  |  |  |  |  |  | $ 14,113 |
Fremaux Town Center JV, LLC - Phase I |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 2.44% |  |  |  |
Principal Balance Repaid |  |  |  |  | $ 40,530 |  |  |  |
Fremaux Town Center JV, LLC - Phase II |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 2.44% |  |  |  |
Principal Balance Repaid |  |  |  |  | $ 30,595 |  |  |  |
Ambassador Town Center JV, LLC |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 2.24% |  |  |  |
Principal Balance Repaid |  |  |  |  | $ 41,885 |  |  |  |
Mortgage loan |  |  |  |  | 47,660 |  |  |  |
Fremaux Town Center JV, LLC |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Mortgage loan |  |  |  |  | $ 73,000 |  |  |  |

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