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Note 7 - Investments and Advances In Real Estate Joint Ventures (Details Textual) ft² in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) ft² | Dec. 31, 2016 USD ($) ft² | Dec. 31, 2015 USD ($)
Gross Leasable Area | ft² | 2,875 | [1] | 2,665 |
Business Combination, Consideration Transferred | $ 688,326 |  | $ 645,624 |
Other Liabilities | 431,915 |  | 404,137 |
Equity Method Investments | 483,861 |  | $ 504,209 |
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] | CANADA |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax | $ (4,800) |  |  |
All Equity Method Investments [Member] |  |  |  |
Gross Leasable Area | ft² | 23,500 |  | 26,200 |
Kim Pru and Kim Pru II [Member] |  |  |  |
Number of Joint Ventures | 4 |  |  |
Number Of Accounts | 4 |  |  |
Kim Pru [Member] |  |  |  |
Number of Joint Ventures | 3 |  |  |
CPP [Member] | Property Interest Adjacent to Existing Operating Property in Temecula, CA [Member] |  |  |  |
Business Combination, Consideration Transferred |  |  | $ 27,500 |
Other Joint Venture Programs [Member] |  |  |  |
Impairment of Long-Lived Assets to be Disposed of | $ 3,400 |  |  |
Other Liabilities | 2,100 |  | 11,000 |
Real Estate Joint Ventures [Member] | Operating Properties [Member] |  |  |  |
Business Combination, Consideration Transferred | $ 320,100 |  | $ 590,100 | $ 1,600,000
Number of Real Estate Properties, Interest Disposed of or Transferred | 13 |  | 45 | 98
Equity Method Investment, Sales Price | $ 180,800 |  | $ 1,100,000 | $ 1,800,000
Equity Method Investment, Realized Gain (Loss) on Disposal | $ 7,500 |  | $ 151,200 | $ 380,600
Number of Real Estate Properties, Remaining Interest Acquired | 3 |  | 9 | 43
Real Estate Joint Ventures [Member] | Land Parcels [Member] |  |  |  |
Number of Real Estate Properties, Interest Disposed of or Transferred |  |  | 1 |
Number of Real Estate Properties, Remaining Interest Acquired |  |  |  | 11
Real Estate Joint Ventures [Member] | Development Properties [Member] |  |  |  |
Number of Real Estate Properties, Remaining Interest Acquired |  |  | 1 |
[1] | Gross leasable area ("GLA")

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