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Note 7 - Assets and Liabilities Measured at Fair Value (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 1 [Member] | Building and Building Improvements [Member]
Certain buildings and improvements
Fair Value, Inputs, Level 1 [Member]
Equity-method investment
Fair Value, Inputs, Level 2 [Member] | Building and Building Improvements [Member]
Certain buildings and improvements
Fair Value, Inputs, Level 2 [Member]
Equity-method investment
Fair Value, Inputs, Level 3 [Member] | Building and Building Improvements [Member]
Certain buildings and improvements		6,559
Fair Value, Inputs, Level 3 [Member]
Equity-method investment	$ 11,157	$ 22,284

X

- Definition

Fair value portion of investments accounted under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=66022186&loc=d3e32014-111567

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X

- Definition

Fair value portion of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

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