Note 18 - Equity Incentive Plans - Tax Short-fall from Share-based Payment Arrangements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Short-fall of tax deductions in excess of grant-date fair value		$ (5,348)	$ (1,285)
Benefit of tax deductions on grant-date fair value		6,485	1,292
Total benefit of tax deductions		$ 1,137	$ 7