Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Impaired Loans and Related Allowances (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Loans With an Allowance Recorded, Related Allowance	$ 6,552	$ 4,813
Total, Recorded Investment	28,137	37,100
Total, Unpaid Principal Balance	34,580	46,991
Total, Related Allowance	6,552	4,813
1-4 Family [Member]
Financing Receivable, Impaired [Line Items]
Loans With No Related Allowance Recorded, Recorded Investment	1,583	1,617
Loans With No Related Allowance Recorded, Unpaid Principal Balance	1,583	1,617
Loans With No Related Allowance Recorded, Related Allowance	0	0
Loans With an Allowance Recorded, Recorded Investment	1,840	3,070
Loans With an Allowance Recorded, Unpaid Principal Balance	1,884	3,114
Loans With an Allowance Recorded, Related Allowance	309	571
Total, Recorded Investment	3,423	4,687
Total, Unpaid Principal Balance	3,467	4,731
Total, Related Allowance	309	571
Residential Developments [Member]
Financing Receivable, Impaired [Line Items]
Loans With No Related Allowance Recorded, Recorded Investment	8,754	10,714
Loans With No Related Allowance Recorded, Unpaid Principal Balance	11,946	15,530
Loans With No Related Allowance Recorded, Related Allowance	0	0
Loans With an Allowance Recorded, Recorded Investment	12,109	14,061
Loans With an Allowance Recorded, Unpaid Principal Balance	14,400	16,545
Loans With an Allowance Recorded, Related Allowance	4,943	1,669
Total, Recorded Investment	20,863	24,775
Total, Unpaid Principal Balance	26,346	32,075
Total, Related Allowance	4,943	1,669
Commercial Real Estate Other [Member]
Financing Receivable, Impaired [Line Items]
Loans With No Related Allowance Recorded, Recorded Investment	335	640
Loans With No Related Allowance Recorded, Unpaid Principal Balance	335	640
Loans With No Related Allowance Recorded, Related Allowance	0	0
Loans With an Allowance Recorded, Recorded Investment	1,371	2,780
Loans With an Allowance Recorded, Unpaid Principal Balance	1,454	3,133
Loans With an Allowance Recorded, Related Allowance	275	921
Total, Recorded Investment	1,706	3,420
Total, Unpaid Principal Balance	1,789	3,773
Total, Related Allowance	275	921
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans With No Related Allowance Recorded, Recorded Investment	287	393
Loans With No Related Allowance Recorded, Unpaid Principal Balance	293	400
Loans With No Related Allowance Recorded, Related Allowance	0	0
Loans With an Allowance Recorded, Recorded Investment	459	1,430
Loans With an Allowance Recorded, Unpaid Principal Balance	459	1,430
Loans With an Allowance Recorded, Related Allowance	335	537
Total, Recorded Investment	746	1,823
Total, Unpaid Principal Balance	752	1,830
Total, Related Allowance	335	537
Construction Industry [Member]
Financing Receivable, Impaired [Line Items]
Loans With No Related Allowance Recorded, Recorded Investment	96	102
Loans With No Related Allowance Recorded, Unpaid Principal Balance	171	1,038
Loans With No Related Allowance Recorded, Related Allowance	0	0
Loans With an Allowance Recorded, Recorded Investment	0	74
Loans With an Allowance Recorded, Unpaid Principal Balance	0	74
Loans With an Allowance Recorded, Related Allowance	0	62
Total, Recorded Investment	96	176
Total, Unpaid Principal Balance	171	1,112
Total, Related Allowance	0	62
Commercial Business Other [Member]
Financing Receivable, Impaired [Line Items]
Loans With No Related Allowance Recorded, Recorded Investment	0	34
Loans With No Related Allowance Recorded, Unpaid Principal Balance	0	534
Loans With No Related Allowance Recorded, Related Allowance	0	0
Loans With an Allowance Recorded, Recorded Investment	1,303	2,185
Loans With an Allowance Recorded, Unpaid Principal Balance	2,055	2,936
Loans With an Allowance Recorded, Related Allowance	690	1,053
Total, Recorded Investment	1,303	2,219
Total, Unpaid Principal Balance	2,055	3,470
Total, Related Allowance	$ 690	$ 1,053