Note 3 - Loans (Details) - Age Analysis of Past Due Loans Excluding Nonaccrual Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 2,698	$ 2,585
60-89 Days Past Due	382	1,040
90 Days or More Past Due	119	0
Total Past Due	3,199	3,625
Nonaccrual Loans	9,430	10,076
Current	956,923	973,445
Total Financing Receivables	969,406	987,146	961,090
Recorded Investment > 90 days and accruing	119	0
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	86	220
60-89 Days Past Due	116	0
90 Days or More Past Due	0	0
Total Past Due	202	220
Nonaccrual Loans	110	116
Current	162,766	166,658
Total Financing Receivables	163,078	166,994	151,057
Recorded Investment > 90 days and accruing	0	0
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,016	999
60-89 Days Past Due	163	97
90 Days or More Past Due	0	0
Total Past Due	1,179	1,096
Nonaccrual Loans	5,559	5,447
Current	467,780	472,853
Total Financing Receivables	474,518	479,396	471,495
Recorded Investment > 90 days and accruing	0	0
First Lien Residential Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,087	907
60-89 Days Past Due	50	826
90 Days or More Past Due	119	0
Total Past Due	1,256	1,733
Nonaccrual Loans	3,450	4,217
Current	208,793	211,002
Total Financing Receivables	213,499	216,952	215,926
Recorded Investment > 90 days and accruing	119	0
Junior Lein Residential Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	211	0
60-89 Days Past Due	0	81
90 Days or More Past Due	0	0
Total Past Due	211	81
Nonaccrual Loans	285	287
Current	51,988	54,120
Total Financing Receivables	52,484	54,488	56,335
Recorded Investment > 90 days and accruing	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	298	459
60-89 Days Past Due	53	36
90 Days or More Past Due	0	0
Total Past Due	351	495
Nonaccrual Loans	26	9
Current	65,450	68,660
Total Financing Receivables	65,827	69,164	66,277
Recorded Investment > 90 days and accruing	0	0
Deferred Fees and Costs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days or More Past Due	0	0
Total Past Due	0	0
Nonaccrual Loans	0	0
Current	146	152
Total Financing Receivables	146	152
Recorded Investment > 90 days and accruing	$ 0	$ 0