Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Non-Accrual Loans (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Non-Accrual Loans [Line Items]
Non-accruing loans	$ 22,357	$ 29,975
1-4 Family [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Non-Accrual Loans [Line Items]
Non-accruing loans	1,626	2,492
Residential Developments [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Non-Accrual Loans [Line Items]
Non-accruing loans	18,950	23,652
Commercial Real Estate Other [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Non-Accrual Loans [Line Items]
Non-accruing loans	628	1,891
Consumer [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Non-Accrual Loans [Line Items]
Non-accruing loans	442	300
Construction Industry [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Non-Accrual Loans [Line Items]
Non-accruing loans	97	176
Commercial Business Other [Member]
Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Non-Accrual Loans [Line Items]
Non-accruing loans	$ 614	$ 1,464