Note 4 - Loans and Allowance for Loan Losses (Details) - Activity in the Allowance for Loan Losses, by Portfolio Segment, for the Current Year: (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	$ 27,530	$ 27,398	$ 27,442	$ 27,882	$ 27,076
Provision for loan losses	1,128	1,081	3,638	3,034
Charge-offs	(2,444)	(1,486)	(6,767)	(5,177)
Recoveries	862	540	2,763	1,794
Net charge-offs	(1,582)	(946)	(4,004)	(3,383)
Balance	27,076	27,533	27,076	27,533		27,442
Period-end amount allocated to:
Loans individually evaluated for impairment	506	1,814	506	1,814		1,960
Loans collectively evaluated for impairment	26,570	25,719	26,570	25,719		25,482
Balance	27,076	27,533	27,076	27,533		27,442
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	3,951	3,719	3,205	3,446
Provision for loan losses	994	(15)	1,970	347
Charge-offs	(474)	(20)	(734)	(249)
Recoveries	171	40	201	180
Net charge-offs	(303)	20	(533)	(69)
Balance	4,642	3,724	4,642	3,724		3,205
Period-end amount allocated to:
Loans individually evaluated for impairment		118		118		93
Loans collectively evaluated for impairment	4,642	3,606	4,642	3,606		3,112
Balance	4,642	3,724	4,642	3,724		3,205
Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	16,169	15,475	16,885	15,453
Provision for loan losses	(419)	308	(316)	1,093
Charge-offs	(534)	(247)	(2,484)	(1,373)
Recoveries	379	151	1,510	514
Net charge-offs	(155)	(96)	(974)	(859)
Balance	15,595	15,687	15,595	15,687		16,885
Period-end amount allocated to:
Loans individually evaluated for impairment	478	1,461	478	1,461		1,680
Loans collectively evaluated for impairment	15,117	14,226	15,117	14,226		15,205
Balance	15,595	15,687	15,595	15,687		16,885
Credit Cards [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	5,510	6,876	5,430	7,211
Provision for loan losses	576	369	1,711	1,246
Charge-offs	(788)	(770)	(2,329)	(2,422)
Recoveries	190	235	676	675
Net charge-offs	(598)	(535)	(1,653)	(1,747)
Balance	5,488	6,710	5,488	6,710		5,430
Period-end amount allocated to:
Loans individually evaluated for impairment		77		77		16
Loans collectively evaluated for impairment	5,488	6,633	5,488	6,633		5,414
Balance	5,488	6,710	5,488	6,710		5,430
Other Consumer and Other Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	1,900	1,328	1,922	1,772
Provision for loan losses	(23)	419	273	348
Charge-offs	(648)	(449)	(1,220)	(1,133)
Recoveries	122	114	376	425
Net charge-offs	(526)	(335)	(844)	(708)
Balance	1,351	1,412	1,351	1,412		1,922
Period-end amount allocated to:
Loans individually evaluated for impairment	28	158	28	158		171
Loans collectively evaluated for impairment	1,323	1,254	1,323	1,254		1,751
Balance	$ 1,351	$ 1,412	$ 1,351	$ 1,412		$ 1,922