Note 3 - Loans (Details) - Unpaid Principal Balance in Financing Receivables (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Commercial and Industrial [Member]	Jun. 30, 2012 Commercial and Industrial [Member]	Jun. 30, 2013 Commercial Real Estate Loans [Member]	Jun. 30, 2012 Commercial Real Estate Loans [Member]	Jun. 30, 2013 First Lien Residential Mortgage Loans [Member]	Jun. 30, 2012 First Lien Residential Mortgage Loans [Member]	Jun. 30, 2013 Junior Lein Residential Mortgage Loans [Member]	Jun. 30, 2012 Junior Lein Residential Mortgage Loans [Member]	Jun. 30, 2013 Consumer Loans [Member]	Jun. 30, 2012 Consumer Loans [Member]	Jun. 30, 2013 Unallocated Financing Receivables [Member]	Jun. 30, 2012 Unallocated Financing Receivables [Member]	Jun. 30, 2013 Unpaid Principle Balance [Member]	Jun. 30, 2012 Unpaid Principle Balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance Ending balance: individually evaluated for impairment			$ 509	$ 169	$ 2,839	$ 2,963	$ 2,883	$ 2,063	$ 161	$ 86	$ 40	$ 193	$ 0	$ 0	$ 6,432	$ 5,474
Allowance Ending balance: collectively evaluated for impairment			1,312	2,235	7,398	8,252	3,404	3,580	408	437	539	658	746	886	13,807	16,048
Financing Receivable Ending balance	974,804	963,762	155,528	162,397	477,850	481,525	214,835	213,732	56,483	62,347	69,839	68,029	0	0	974,535	988,030
Financing Receivable Ending balance: individually evaluated for impairment			2,797	4,276	19,493	22,396	10,665	9,510	551	451	157	516	0	0	33,663	37,149
Financing Receivable Ending balance: collectively evaluated for impairment			$ 152,731	$ 158,121	$ 458,357	$ 459,129	$ 204,170	$ 204,222	$ 55,932	$ 61,896	$ 69,682	$ 67,513	$ 0	$ 0	$ 940,872	$ 950,881