Note 18 - Equity Incentive Plans - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Balance (in shares)	1,031,170	2,332,904	2,812,874
Balance (in dollars per share)	$ 31.27	$ 32.34	$ 31.81
Balance (Year)	1 year 36 days	328 days	1 year 73 days	1 year 328 days
Balance	$ 1,211	$ 3,268	$ 1,388	$ 2,119
Exercised (in shares)	(327,830)	(214,580)	(5,500)
Exercised (in dollars per share)	$ 23.37	$ 23.37	$ 23.37
Forfeited (in shares)	(620,670)	(1,087,154)	(474,470)
Forfeited (in dollars per share)	$ 36.50	$ 35.13	$ 29.28
Balance (in shares)	82,670	1,031,170	2,332,904	2,812,874
Balance (in dollars per share)	$ 23.37	$ 31.27	$ 32.34	$ 31.81
Exercisable (in shares)	82,670
Exercisable (in dollars per share)	$ 23.37
Exercisable (Year)	1 year 36 days
Exercisable	$ 1,211