Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Average Recorded Investment and Interest Income Recognized on Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Average Recorded Investment and Interest Income Recognized on Impaired Loans [Line Items]
Impaired Financing Receivable, Average Recorded Investment, Total	$ 29,947	$ 44,673	$ 33,171	$ 47,415
Impaired Financing Receivable, Interest Income, Accrual Method, Total	366	182	453	758
1-4 Family [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Average Recorded Investment and Interest Income Recognized on Impaired Loans [Line Items]
Loans With no Allowance Recorded, Average Recorded Investment	1,589	3,214	1,608	3,312
Loans With no Allowance Recorded, Interest Income Recognized	31	20	46	70
Loans With an Allowance Recorded, Average Recorded Investment	2,272	3,491	2,571	3,780
Loans With an Allowance Recorded, Interest Income Recognized	6	13	19	52
Impaired Financing Receivable, Average Recorded Investment, Total	3,861	6,705	4,179	7,092
Impaired Financing Receivable, Interest Income, Accrual Method, Total	37	33	65	122
Residential Developments [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Average Recorded Investment and Interest Income Recognized on Impaired Loans [Line Items]
Loans With no Allowance Recorded, Average Recorded Investment	9,127	11,737	9,338	10,752
Loans With no Allowance Recorded, Interest Income Recognized	29	60	43	370
Loans With an Allowance Recorded, Average Recorded Investment	12,031	14,521	13,519	14,627
Loans With an Allowance Recorded, Interest Income Recognized	27	37	41	111
Impaired Financing Receivable, Average Recorded Investment, Total	21,158	26,258	22,857	25,379
Impaired Financing Receivable, Interest Income, Accrual Method, Total	56	97	84	481
Commercial Real Estate Other [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Average Recorded Investment and Interest Income Recognized on Impaired Loans [Line Items]
Loans With no Allowance Recorded, Average Recorded Investment	335	2,540	424	3,177
Loans With no Allowance Recorded, Interest Income Recognized	16	4	18	22
Loans With an Allowance Recorded, Average Recorded Investment	1,856	2,577	2,249	4,272
Loans With an Allowance Recorded, Interest Income Recognized	228	2	232	4
Impaired Financing Receivable, Average Recorded Investment, Total	2,191	5,117	2,673	7,449
Impaired Financing Receivable, Interest Income, Accrual Method, Total	244	6	250	26
Consumer [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Average Recorded Investment and Interest Income Recognized on Impaired Loans [Line Items]
Loans With no Allowance Recorded, Average Recorded Investment	309	355	315	390
Loans With no Allowance Recorded, Interest Income Recognized	5	3	8	6
Loans With an Allowance Recorded, Average Recorded Investment	998	1,672	1,221	1,269
Loans With an Allowance Recorded, Interest Income Recognized	7	32	18	75
Impaired Financing Receivable, Average Recorded Investment, Total	1,307	2,027	1,536	1,659
Impaired Financing Receivable, Interest Income, Accrual Method, Total	12	35	26	81
Construction Industry [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Average Recorded Investment and Interest Income Recognized on Impaired Loans [Line Items]
Loans With no Allowance Recorded, Average Recorded Investment	98	99	90	269
Loans With no Allowance Recorded, Interest Income Recognized	0	0	0	0
Loans With an Allowance Recorded, Average Recorded Investment	0	243	36	164
Loans With an Allowance Recorded, Interest Income Recognized	0	0	0	0
Impaired Financing Receivable, Average Recorded Investment, Total	98	342	126	433
Impaired Financing Receivable, Interest Income, Accrual Method, Total	0	0	0	0
Commercial Business Other [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Average Recorded Investment and Interest Income Recognized on Impaired Loans [Line Items]
Loans With no Allowance Recorded, Average Recorded Investment	0	1,620	9	1,556
Loans With no Allowance Recorded, Interest Income Recognized	0	2	0	8
Loans With an Allowance Recorded, Average Recorded Investment	1,332	2,604	1,791	3,847
Loans With an Allowance Recorded, Interest Income Recognized	17	9	28	40
Impaired Financing Receivable, Average Recorded Investment, Total	1,332	4,224	1,800	5,403
Impaired Financing Receivable, Interest Income, Accrual Method, Total	$ 17	$ 11	$ 28	$ 48