Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Stock Awards Excluded from the Computation of the Effect of Dilutive Securities (Details)

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Note 3 - Stock Awards Excluded from the Computation of the Effect of Dilutive Securities (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Employee Stock Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 10 10
Stock Appreciation Rights (SARs) [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 1,027 1,041 1,027 1,041
Restricted Stock Units (RSUs) [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 1,230 1,747 1,230 1,747
Performance Shares [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 188 188
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 2,257 2,986 2,257 2,986