Note 2 - Operating Property Activities - Purchase Price Allocation (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Dec. 31, 2016
Business Acquisitions in 2017 [Member]
Allocation	$ 90
Allocation	59,563
Business Acquisitions in 2017 [Member] \| Above Market Leases [Member]
Allocation	1,418
Business Acquisitions in 2017 [Member] \| Below Market Leases [Member]
Allocation	(1,345)
Business Acquisitions in 2017 [Member] \| Leases, Acquired-in-Place [Member]
Allocation	2,724
Business Acquisitions in 2017 [Member] \| Tenant Improvements [Member]
Allocation	961
Business Acquisitions in 2016 [member]
Allocation	234	$ 234
Allocation	645,624	645,624
Allocation	(4,292)	(4,292)
Allocation	(27)	(27)
Business Acquisitions in 2016 [member] \| Above Market Leases [Member]
Allocation	12,867	11,982
Allocation adjustments	885
Business Acquisitions in 2016 [member] \| Below Market Leases [Member]
Allocation	(36,619)	(31,903)
Allocation adjustments	(4,716)
Business Acquisitions in 2016 [member] \| Leases, Acquired-in-Place [Member]
Allocation	43,031	44,094
Allocation adjustments	(1,063)
Land [Member] \| Business Acquisitions in 2017 [Member]
Allocation	14,516
Land [Member] \| Business Acquisitions in 2016 [member]
Allocation	174,000	179,150
Allocation adjustments	(5,150)
Building [Member] \| Business Acquisitions in 2017 [Member]
Allocation	34,135
Building [Member] \| Business Acquisitions in 2016 [member]
Allocation	278,797	309,493
Allocation adjustments	(30,696)
Building Improvements [Member] \| Business Acquisitions in 2017 [Member]
Allocation	7,064
Building Improvements [Member] \| Business Acquisitions in 2016 [member]
Allocation	166,000	124,105
Allocation adjustments	41,895
Tenant Improvements [Member] \| Business Acquisitions in 2016 [member]
Allocation	11,633	$ 12,788
Allocation adjustments	$ (1,155)

The fair value debt adjustments resulting from the business acquisition.

No definition available.

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- Definition

The amount of identifiable intangible liabilities recognized as of the acquisition date.

+ References

No definition available.

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- Definition

This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to intangibles acquired in connection with a business combination for which the initial accounting was incomplete.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 4A
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84161108&loc=SL65897772-128472

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- Definition

This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to property, plant, and equipment acquired in connection with a business combination for which the initial accounting was incomplete.

+ References

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

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- Definition

Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

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- Definition

Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
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