Note 10 - Allowance for Loan Losses and Credit Quality Information (Details) - Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Accrual	$ 5,781	$ 7,125
Non-Accrual	19,933	25,930
Total	25,714	33,055
1-4 Family [Member]
Financing Receivable, Modifications [Line Items]
Accrual	1,798	2,196
Non-Accrual	814	1,404
Total	2,612	3,600
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Accrual	2,990	2,653
Non-Accrual	18,301	23,222
Total	21,291	25,875
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Accrual	304	1,522
Non-Accrual	257	292
Total	561	1,814
Commercial Business [Member]
Financing Receivable, Modifications [Line Items]
Accrual	689	754
Non-Accrual	561	1,012
Total	$ 1,250	$ 1,766