Note 6 - Securities (Details) - Gross Realized Gains and Losses from Available-for-sale Securities - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gross Realized Gains and Losses from Available-for-sale Securities [Abstract]
Gross realized gains from sales	$ 932	$ 140	$ 1,006	$ 342
Gross realized losses from sales	0	(37)	0	(208)
Net realized gains	$ 932	$ 103	$ 1,006	$ 134