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Note 4 - Investments in and Advances to Real Estate Joint Ventures (Details Textual) ft² in Thousands, $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 USD ($) ft² | Mar. 31, 2016 USD ($) | Dec. 31, 2016 ft²
Gross Leasable Area | ft² | [1] | 411 |  |
Business Combination, Consideration Transferred |  | $ 59,563 |  |
All Equity Method Investments [Member] |  |  |  |
Gross Leasable Area | ft² |  | 25,300 |  | 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 |  |
Real Estate Joint Ventures [Member] | Operating Properties [Member] |  |  |  |
Number of Real Estate Properties, Interest Disposed of or Transferred |  | 5 |  |
Equity Method Investment, Sales Price |  | $ 47,700 |  |
Equity Method Investment, Realized Gain (Loss) on Disposal |  | $ 900 | $ 54,100 |
Number of Real Estate Properties, Remaining Interest Acquired |  | 2 | 9 |
Business Combination, Consideration Transferred |  | $ 15,400 | $ 344,500 |
[1] | Gross leasable area ("GLA")

X
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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