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Note 3 - Discontinued Operations (Details) (USD $)
 6 Months Ended 6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2014
Sold [Member]
Assets Held-for-sale [Member]
Discontinued Operations [Member]
Operating Properties [Member]
Jun. 30, 2014
Sold [Member]
Assets Held-for-sale [Member]
Discontinued Operations [Member]
Impaired Operating Properties [Member]
Jun. 30, 2014
Operating Properties [Member]
Initial [Member]
Assets Held-for-sale [Member]
Discontinued Operations [Member]
Jun. 30, 2014
Operating Properties [Member]
Assets Held-for-sale [Member]
Discontinued Operations [Member]
Other Assets [Member]
Jun. 30, 2014
Operating Properties [Member]
Assets Held-for-sale [Member]
Discontinued Operations [Member]
Jun. 30, 2014
Assets Held-for-sale [Member]
Discontinued Operations [Member]
Operating Properties [Member]
Jun. 30, 2014
Assets Held-for-sale [Member]
Discontinued Operations [Member]
Impaired Operating Properties [Member]
Jun. 30, 2014
Assets Held-for-sale [Member]
Operating Properties [Member]
Jun. 30, 2014
Assets Held-for-sale [Member]
Impaired Operating Properties [Member]
Jun. 30, 2014
Assets Held-for-sale [Member]
Reclassified Properties [Member]
Note 3 - Discontinued Operations (Details) [Line Items]                        
Number of Real Estate Properties     2   15   13   4 150 18 1
Real Estate Held-for-sale           $ 108,800,000   $ 144,700,000        
Real Estate Investment Property, Accumulated Depreciation 1,941,902,000 1,878,681,000       25,900,000   32,600,000        
Impairment of Real Estate       900,000         7,100,000      
Fair Value of Real Estate 113,644,000 217,529,000           197,000,000        
Mortgage Debt Reclassified to Other Liabilities $ 2,400,000