Note 3 - Loans (Details) - Average Recorded Investment and Income Recognized on Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	$ 8,057	$ 10,056
Period End Loans With No Allocated Allowance Interest Income Recognized	162	304
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	15,597	21,420
Period End Loans With Allocated Allowance Interest Income Recognized	205	301
Total
Average Recorded Investment	23,654	31,476
Interest Income Recognized	371	605
Commercial and Industrial [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	264	1,117
Period End Loans With No Allocated Allowance Interest Income Recognized	1	54
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	411	1,520
Period End Loans With Allocated Allowance Interest Income Recognized	13	16
Total
Average Recorded Investment	675	2,637
Interest Income Recognized	14	70
Commercial Real Estate Portfolio Segment [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	7,793	8,939
Period End Loans With No Allocated Allowance Interest Income Recognized	165	250
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	7,854	8,341
Period End Loans With Allocated Allowance Interest Income Recognized	115	122
Total
Average Recorded Investment	15,647	17,280
Interest Income Recognized	280	372
First Lien Residential Mortgage Loans [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	0	0
Period End Loans With No Allocated Allowance Interest Income Recognized	0	0
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	6,783	10,534
Period End Loans With Allocated Allowance Interest Income Recognized	72	152
Total
Average Recorded Investment	6,783	10,534
Interest Income Recognized	72	152
Junior Lein Residential Mortgage Loans [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	0	0
Period End Loans With No Allocated Allowance Interest Income Recognized	0	0
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	358	606
Period End Loans With Allocated Allowance Interest Income Recognized	3	4
Total
Average Recorded Investment	358	606
Interest Income Recognized	3	4
Consumer Portfolio Segment [Member]
Period end loans with no allocated allowance for loan losses
Period End Loans With No Allocated Allowance Average Recorded Investment	0	0
Period End Loans With No Allocated Allowance Interest Income Recognized	0	0
Period end loans with allocated allowance for loan losses
Period End Loans With Allocated Allowance Average Recorded Investment	191	419
Period End Loans With Allocated Allowance Interest Income Recognized	2	7
Total
Average Recorded Investment	191	419
Interest Income Recognized	$ 2	$ 7