Quarterly report pursuant to Section 13 or 15(d)

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

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Note 3 - Summary of Significant Accounting Policies - Stock Awards Excluded from the Computation of the Effect of Dilutive Securities (Details) - shares
shares in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Employee Stock Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Stock Appreciation Rights (SARs) [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 1,027 1,028 1,027 1,028
Restricted Stock Units (RSUs) [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 1,151 1,745 1,151 1,745
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) 2,178 2,961 2,178 2,961