Note 8 - Capital of the Operating Partnership (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Note 8 - Capital of the Operating Partnership (Details) [Line Items]    
Limited Partners' Capital Account, Units Outstanding 97,738,545  
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest 96.00%  
Common Stock, Shares, Outstanding 93,817,231 92,991,333
OP Units [Member]    
Note 8 - Capital of the Operating Partnership (Details) [Line Items]    
Partners' Capital Account, Units 3,921,314  
Non Controlling Interest Redemption Value (in Dollars) 71.4  
Non Controlling Interests Redemption Value Price Per Share (in Dollars per share) 18.22