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Note 10 - Earnings Per Share (Details) - shares
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Note 10 - Earnings Per Share (Details) [Line Items]        
Weighted Average Number of Shares Outstanding, Basic and Diluted 41.9   41.9 41.7
Weighted Average Number of Shares Outstanding, Basic 41.9 41.8 41.9 41.7
Weighted Average Number of Shares Outstanding, Diluted 41.9 43.3 41.9 41.7
Employee Stock Option [Member]        
Note 10 - Earnings Per Share (Details) [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0.1 0.1 0.0 0.2