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Note 19 - Stock-based Compensation (Details) - Restricted Stock Unit Activity - Restricted Stock Units (RSUs) [Member]
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Note 19 - Stock-based Compensation (Details) - Restricted Stock Unit Activity [Line Items]  
Outstanding | shares 685,430
Outstanding | $ / shares $ 22.15
Granted | shares 387,187
Granted | $ / shares $ 14.86
Vested | shares (237,957)
Vested | $ / shares $ 21.73
Forfeited | shares (60,115)
Forfeited | $ / shares $ 15.74
Outstanding | shares 774,545
Outstanding | $ / shares $ 19.13