Note 5 - Deposits (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Disclosure Text Block [Abstract]
Deposits	$ 2,265,122,000	$ 2,275,382,000
Increase (Decrease) in Deposits	$ (10,300,000)
Aggregate Increase (Decrease) in Percentage of Deposits	(0.50%)