Note 14 - Stock Based Compensation (Details) - Stock Compensation Plans	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Stock Compensation Plans [Abstract]
Stock Options Outstanding, Number of Shares	119,690
Stock Options Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ / shares	$ 27.72
Non-Vested Stock Awards Outstanding, Number of Shares	226,932
Non-Vested Stock Awards Outstanding, Weighted Average Grant-Date Fair-Value (in Dollars per share) | $ / shares	$ 31.88
Exercisable, September 30, 2015	105,572
Exercisable, September 30, 2015 (in Dollars per share) | $ / shares	$ 26.84
Granted	375,255
Granted (in Dollars per share) | $ / shares	$ 4,469
Granted	95,020
Granted (in Dollars per share) | $ / shares	$ 43.47
Stock Options Exercised	(65,418)
Stock Options Exercised (in Dollars per share) | $ / shares	$ 22.37
Stock Options from Acquisitions	65,850
Stock Options from Acquisitions	20.43
Stock Awards Vested	(79,607)
Stock Awards Vested (in Dollars per share) | $ / shares	$ 34.37
Forfeited/Expired	(1,450)
Forfeited/Expired (in Dollars per share) | $ / shares	$ 20.60
Forfeited/Expired	(14,751)
Forfeited/Expired (in Dollars per share) | $ / shares	$ 20.70
Stock Options Outstanding, Number of Shares	493,927
Stock Options Outstanding, Weighted Average Exercise Price (in Dollars per share) | $ / shares	$ 40.30
Non-Vested Stock Awards Outstanding, Number of Shares	227,594
Non-Vested Stock Awards Outstanding, Weighted Average Grant-Date Fair-Value (in Dollars per share) | $ / shares	$ 36.57