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v3.7.0.1

Fair Value Measurements (Details Textual) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2017 USD ($) Properties | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) Properties | Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Provision for asset impairment | $ 0 | $ 29,931,000 | $ 16,440,000 | $ 38,321,000 |
Provision for Asset Impairment |  |  | 16,440,000 | 114,904,000 |
Provision for asset impairment for disposed properties |  |  |  | 76,583,000 |
Continuing Operations [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Provision for asset impairment | $ 0 | $ 29,931,000 | $ 16,440,000 | 38,321,000 |
Provision for Asset Impairment |  |  |  | $ 8,390,000 |
Real Estate [Member] | Retail [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Provision for asset impairment, properties affected | Properties | 3 |  |  | 3 |
Mortgages [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value inputs, discount rate (percent) |  |  | 4.90% |  | 5.07%
Line of Credit [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value inputs, discount rate (percent) |  |  | 3.18% |  | 3.15%
Minimum [Member] | Discontinued Operations [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Capitalization Rate |  |  |  | 6.75% |
Fair value inputs, discount rate (percent) |  |  |  | 7.75% |
Minimum [Member] | Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Cap Rate |  |  |  | 6.75% |
Fair value inputs, discount rate (percent) |  |  |  | 7.00% |
Maximum [Member] | Discontinued Operations [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Capitalization Rate |  |  |  | 10.00% |
Fair value inputs, discount rate (percent) |  |  |  | 15.25% |
Maximum [Member] | Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Cap Rate |  |  |  | 7.00% |
Fair value inputs, discount rate (percent) |  |  |  | 8.00% |
Non-core [Member] | Real Estate [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Provision for asset impairment, properties affected | Properties |  |  |  | 1 |

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