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UNCONSOLIDATED AFFILIATES AND COST METHOD INVESTMENT (Joint Venture Financings) (Details) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 USD ($) | Oct. 31, 2017 USD ($) extension_option | Aug. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) extension_option | Jun. 30, 2016 USD ($) | Feb. 29, 2016 USD ($) | Jan. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) extension_option | Dec. 31, 2015 USD ($) | Dec. 31, 2018 | Oct. 31, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  |  |  |  |  | $ 1,802,000 | $ 0 | $ 0 |  |
Monthly principal payments | $ 361,411,000 |  |  |  |  |  |  | 361,411,000 |  |  |  |
Mortgage and other indebtedness, net | 4,230,845,000 |  |  | $ 4,465,294,000 |  |  |  | $ 4,230,845,000 | $ 4,465,294,000 |  |  |
Ambassador Infrastructure, LLC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage guaranteed by the company |  |  | 100.00% |  |  |  |  | 100.00% |  |  |  |
Ambassador Infrastructure, LLC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  | $ 11,035,000 |  |  |  |  |  |  |  |  |
Ambassador Infrastructure, LLC | Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of interest rate swaps held |  |  | $ 9,360,000 |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.74% |  |  |  |  |  |  |  |  |
Ambassador Infrastructure, LLC | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  | 2.00% |  |  |  |  |  |  |  |  |
Shoppes at Eagle Point, LLC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  | $ 36,400,000 |  |  |  |  |  |  |  |  |  |
Percentage guaranteed by the company |  | 100.00% |  |  |  |  |  |  |  |  |  |
Number of extension options available (extension option) | extension_option |  | 1 |  |  |  |  |  |  |  |  |  |
Extension option, term |  | 2 years |  |  |  |  |  |  |  |  |  |
Shoppes at Eagle Point, LLC | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  | 2.75% |  |  |  |  |  |  |  |  |  |
Shoppes at Eagle Point, LLC | LIBOR | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  |  |  |  |  |  |  |  | 2.35% |
Storage Facility Development - EastGate Mall |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended | $ 6,500,000 |  |  |  |  |  |  |  |  |  |  |
Percentage guaranteed by the company | 100.00% |  |  |  |  |  |  |  |  |  |  |
Monthly principal payments | $ 10,000 |  |  |  |  |  |  | $ 10,000 |  |  |  |
Storage Facility Development - EastGate Mall | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate | 2.75% |  |  |  |  |  |  | 2.75% |  |  |  |
The Pavilion at Port Orange |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  |  |  | $ 58,628,000 |  |  |  |  |  |
The Pavilion at Port Orange | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  |  |  | 2.00% |  |  |  |  |  |
Hammock Landing - Phase I |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  |  |  | $ 43,347,000 | $ 39,475,000 |  |  |  |  |
Hammock Landing - Phase I | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  |  |  | 2.00% |  |  |  |  |  |
Hammock Landing - Phase II |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  |  |  | $ 16,757,000 |  |  |  |  |  |
Hammock Landing - Phase II | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  |  |  | 2.00% |  |  |  |  |  |
Triangle Town Center, Triangle Town Commons and Triangle Town Place |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  |  |  | $ 171,092,000 |  |  |  |  |  |
Number of extension options available (extension option) | extension_option |  |  |  | 2 |  |  |  |  | 2 |  |  |
Extension option, term |  |  |  |  |  |  |  |  | 1 year |  |  |
Triangle Town Center, Triangle Town Commons and Triangle Town Place | If Extension One is Exercised |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, lender fees |  |  |  |  |  | $ 5,000,000 |  |  |  |  |  |
Debt instrument, commitment fee percentage |  |  |  |  |  | 0.50% |  |  |  |  |  |
Triangle Town Center, Triangle Town Commons and Triangle Town Place | If Extension Two is Exercised |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, lender fees |  |  |  |  |  | $ 8,000,000 |  |  |  |  |  |
Debt instrument, commitment fee percentage |  |  |  |  |  | 0.75% |  |  |  |  |  |
Triangle Town Center, Triangle Town Commons and Triangle Town Place | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  | 4.00% |  | 4.00% |  |  | 4.00% | 5.74% |  |
Triangle Town Center, Triangle Town Commons and Triangle Town Place | LIBOR | If Extension Two is Exercised |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  |  |  | 5.737% |  |  |  |  |  |
Fremaux Town Center JV, LLC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  |  | $ 73,000,000 |  |  |  |  |  |  |
Fremaux Town Center JV, LLC | Construction loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Mortgage and other indebtedness, net |  |  |  | $ 71,125,000 |  |  |  |  | $ 71,125,000 |  |  |
Fremaux Town Center JV, LLC | Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of interest rate swaps held |  |  |  |  | 73,000,000 |  |  |  |  |  |  |
Derivative liability |  |  |  |  | $ 52,130,000 |  |  |  |  |  |  |
Fremaux Town Center JV, LLC | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  |  | 3.699% |  |  |  |  |  |  | 3.699%
Ambassador Town Center JV, LLC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  |  | $ 47,660,000 |  |  |  |  |  |  |
Ambassador Town Center JV, LLC | Construction loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Mortgage and other indebtedness, net |  |  |  | 41,885,000 |  |  |  |  | 41,885,000 |  |  |
Ambassador Town Center JV, LLC | Interest Rate Swap |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of interest rate swaps held |  |  |  |  | 47,660,000 |  |  |  |  |  |  |
Derivative liability |  |  |  |  | $ 38,866,000 |  |  |  |  |  |  |
Ambassador Town Center JV, LLC | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  |  | 3.22% |  |  |  |  |  |  |
The Shops at Friendly Center |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount Financed or Extended |  |  |  | 60,000,000 |  |  |  |  |  |  |  |
Mortgage and other indebtedness, net |  |  |  | $ 37,640,000 |  |  |  |  | $ 37,640,000 |  |  |
Debt Instrument, Term |  |  |  | 6 years |  |  |  |  |  |  |  |
The Shops at Friendly Center | LIBOR |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  | 3.34% |  |  |  |  | 3.34% |  |  |
The Shops at Friendly Center | LIBOR | FIxed Rate Loan Maturing in January 2017 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stated Interest Rate |  |  |  | 5.90% |  |  |  |  | 5.90% |  |  |
Port Orange and Hammock Landing - Phase I and II |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage guaranteed by the company |  |  |  |  |  | 20.00% | 25.00% |  |  |  |  |
Extension option, term |  |  |  |  |  | 1 year |  |  |  |  |  |

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Data Type: | na
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