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FAIR VALUE MEASUREMENTS - Long-Lived Assets Measure at Fair Value (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) property | Jun. 30, 2015 USD ($) | Dec. 31, 2014 USD ($) property | Sep. 30, 2014 USD ($) | Jun. 30, 2014 USD ($) | Mar. 31, 2014 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) property outparcel | Dec. 31, 2014 USD ($) property | Dec. 31, 2013 USD ($) | Apr. 30, 2015 USD ($) | Apr. 30, 2014 USD ($) | Sep. 30, 2013 USD ($) | Jun. 30, 2013 USD ($) | Mar. 31, 2013 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties disposed of | property |  |  |  |  |  |  |  | 4 | 3 |  |  |  |  |  |
Fair value of long-lived assets | $ 125,000 |  | $ 69,103 |  |  |  |  | $ 125,000 | $ 69,103 |  |  |  |  |  |
Loss on impairment |  |  |  |  |  |  |  | 105,945 | 17,858 | $ 70,049 |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  | (299,069) | (291,273) | (278,911) |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  | $ 256 | $ 87,893 | (9,108) |  |  |  |  |
Number of properties written down | property | 130 |  | 2 |  |  |  |  | 130 | 2 |  |  |  |  |  |
Air Transportation Equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  |  |  |  |  | $ 105 | 1,799 |  |  |  |  |
Net proceeds from sale of real estate |  |  |  |  |  |  |  |  | 176 | 4,292 |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate investment property, net |  |  | $ 281 |  |  |  |  |  | 281 | 6,091 |  |  |  |  |
Non-cash impairment of long-lived asset |  |  |  |  |  |  |  |  |  | 585 |  |  |  |  |
Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of long-lived assets | $ 125,000 |  | 69,103 |  |  |  |  | $ 125,000 | 69,103 |  |  |  |  |  |
Chesterfield Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of long-lived assets | 125,000 |  |  |  |  |  |  | 125,000 |  |  |  |  |  |  |
Loss on impairment | 99,969 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, beginning carrying value |  |  |  |  |  |  | $ 234,422 | 234,422 |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  | 552 |  |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  | (10,005) |  |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  | (99,969) |  |  |  |  |  |  |
Long-lived assets, ending carrying value | 125,000 |  | 234,422 |  |  |  |  | $ 125,000 | 234,422 |  |  |  |  |  |
Concentration risk, percent of total revenue |  |  |  |  |  |  |  | 1.50% |  |  |  |  |  |  |
Chapel Hill Crossing |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment | 1,914 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of real estate | 2,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mayfaire Community Center |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment | 397 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from sale of real estate | 56,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Madison Square |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of long-lived assets |  |  |  |  |  |  |  |  |  |  | $ 5,000 |  |  |  |
Loss on impairment |  | $ 2,620 | 47,212 |  |  |  |  |  |  |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, beginning carrying value |  |  |  |  |  | $ 8,000 |  |  | 8,000 | 57,231 |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  |  | (2,024) |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  | (47,212) |  |  |  |  |  |
Long-lived assets, ending carrying value |  |  |  |  |  |  |  |  |  | $ 8,000 |  |  |  |  |
Concentration risk, percent of total revenue |  |  |  |  |  |  |  |  |  | 0.70% |  |  |  |  |
Real estate investment property, net |  |  | 8,000 |  |  |  |  |  | 8,000 |  |  |  | $ 55,212 |  |
Chapel Hill Suburban |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  |  | 12,050 |  |  |  |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, beginning carrying value |  |  |  |  |  | 66,120 | 0 | $ 0 | 66,120 |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Disposals |  |  |  |  |  |  |  |  | (33) |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  |  | (1,809) |  |  |  |  |  |
Net sales proceeds |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  | (1,961) |  |  |  |  |  |
Non-recourse debt |  |  |  |  |  |  |  |  | (68,563) |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  | (12,050) |  |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  | 18,296 |  |  |  |  |  |
Long-lived assets, ending carrying value |  |  | 0 |  |  |  |  |  | $ 0 | $ 66,120 |  |  |  |  |
Concentration risk, percent of total revenue |  |  |  |  |  |  |  |  | 0.40% |  |  |  |  |  |
Chapel Hill Suburban | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of long-lived assets |  |  |  |  |  | 53,348 |  |  |  |  |  |  |  |  |
Lakeshore Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  | $ 106 | 5,100 |  |  |  |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, beginning carrying value |  |  |  |  |  | 19,127 | 0 | 0 | $ 19,127 |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 12 |  |  |  |  |  |
Disposals |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  |  | (320) |  |  |  |  |  |
Net sales proceeds |  |  |  |  |  |  |  |  | (13,613) |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Non-recourse debt |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  | (5,206) |  |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Long-lived assets, ending carrying value |  |  | 0 |  |  |  |  |  | $ 0 | 19,127 |  |  |  |  |
Concentration risk, percent of total revenue |  |  |  |  |  |  |  |  | 0.20% |  |  |  |  |  |
Lakeshore Mall | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of long-lived assets |  |  |  |  |  |  |  |  |  |  |  | $ 13,780 |  |  |
Pemberton Plaza |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  | $ 497 |  |  |  |  |  |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, beginning carrying value |  |  |  |  |  | 2,541 | 0 | 0 | $ 2,541 |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 31 |  |  |  |  |  |
Disposals |  |  |  |  |  |  |  |  | (125) |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  |  | (64) |  |  |  |  |  |
Net sales proceeds |  |  |  |  |  |  |  |  | (1,886) |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Non-recourse debt |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  | (497) |  |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Long-lived assets, ending carrying value |  |  | 0 |  |  |  |  |  | $ 0 | 2,541 |  |  |  |  |
Concentration risk, percent of total revenue |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Lakeshore Mall, Pemberton Plaza, and Chapel Hill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  |  |  |  | 104,900 |  |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, beginning carrying value |  |  |  |  |  | 87,788 | 0 | 0 | $ 87,788 |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 43 |  |  |  |  |  |
Disposals |  |  |  |  |  |  |  |  | (158) |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  |  | (2,193) |  |  |  |  |  |
Net sales proceeds |  |  |  |  |  |  |  |  | (15,499) |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  | (1,961) |  |  |  |  |  |
Non-recourse debt |  |  |  |  |  |  |  |  | (68,563) |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  | (17,753) |  |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  | 18,296 |  |  |  |  |  |
Long-lived assets, ending carrying value |  |  | $ 0 |  |  |  |  |  | 0 | 87,788 |  |  |  |  |
Citadel Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  | $ 20,453 |  |  |  |  |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, beginning carrying value |  |  |  |  |  | 23,607 |  |  | 23,607 | 45,178 |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 262 |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  |  | (1,380) |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  | (20,453) |  |  |  |  |  |
Long-lived assets, ending carrying value |  |  |  |  |  |  |  |  |  | $ 23,607 |  |  |  |  |
Concentration risk, percent of total revenue |  |  |  |  |  |  |  |  |  | 0.60% |  |  |  |  |
Real estate investment property, net |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 23,900 | $ 44,353
Madison Square and Citadel Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  |  |  |  |  | 17,753 |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, beginning carrying value |  |  |  |  |  | $ 31,607 |  |  | 31,607 | $ 102,409 |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 267 |  |  |  |  |  |
Depreciation expense |  |  |  |  |  |  |  |  | (3,404) |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  | $ (67,665) |  |  |  |  |  |
Long-lived assets, ending carrying value |  |  |  |  |  |  |  |  |  | $ 31,607 |  |  |  |  |
Burlington |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  |  |  |  | 161 |  |  |  |  |  |  |
Net proceeds from sale of real estate |  |  |  |  |  |  | $ 750 |  |  |  |  |  |  |  |
Property Carrying Values [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying amount | $ 911 |  |  |  |  |  |  | $ 911 |  |  |  |  |  |  |
Outparcel Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties disposed of | outparcel |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Loss on impairment |  |  |  |  |  |  |  | $ 884 |  |  |  |  |  |  |

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