Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Financial Effects of Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Financial Effects of Troubled Debt Restructurings [Line Items]
Number of Contracts	0	17	6	27
Pre-modification Outstanding Recorded Investment	$ 0	$ 1,004	$ 915	$ 1,430
Post-modification Outstanding Recorded Investment	0	616	900	1,051
1-4 Family [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Financial Effects of Troubled Debt Restructurings [Line Items]
Number of Contracts	0	0	2	1
Pre-modification Outstanding Recorded Investment	0	0	760	193
Post-modification Outstanding Recorded Investment	0	0	760	200
Residential Developments [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Financial Effects of Troubled Debt Restructurings [Line Items]
Number of Contracts	0		0
Pre-modification Outstanding Recorded Investment	0		0
Post-modification Outstanding Recorded Investment	0		0
Commercial Real Estate Other Receivable [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Financial Effects of Troubled Debt Restructurings [Line Items]
Number of Contracts	0	1	0	3
Pre-modification Outstanding Recorded Investment	0	679	0	754
Post-modification Outstanding Recorded Investment	0	254	0	329
Consumer [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Financial Effects of Troubled Debt Restructurings [Line Items]
Number of Contracts	0	12	4	17
Pre-modification Outstanding Recorded Investment	0	131	155	249
Post-modification Outstanding Recorded Investment	0	144	140	263
Construction Industry [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Financial Effects of Troubled Debt Restructurings [Line Items]
Number of Contracts	0	0	0	1
Pre-modification Outstanding Recorded Investment	0	0	0	41
Post-modification Outstanding Recorded Investment	0	0	0	41
Commercial Business Other [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Financial Effects of Troubled Debt Restructurings [Line Items]
Number of Contracts	0	4	0	5
Pre-modification Outstanding Recorded Investment	0	194	0	193
Post-modification Outstanding Recorded Investment	$ 0	$ 218	$ 0	$ 218