Note 9 - Allowance for Loan Losses and Credit Quality Information (Details) - Troubled Debt Restructurings that Subsequently Defaulted $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Troubled debt restructurings that subsequently defaulted:
Number of contracts that subsequently defaulted		0		1
Outstanding recorded investment	$ 0	$ 0	$ 0	$ 640
1-4 Family Porfolio Segment[Member]
Troubled debt restructurings that subsequently defaulted:
Number of contracts that subsequently defaulted		0		1
Outstanding recorded investment		$ 0		$ 640