Note 10 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Carried at Fair Value on a Recurring Basis, Classified Within Level 3 of the Valuation Hierarchy (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Municipal [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 10,592	$ 9,223
Purchases	2,000	4,475
Maturities	(85)	(1,085)
Principal repayments	(54)	(160)
Ending balance	12,453	12,453
Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	13,361	14,935
Sales		(1,871)
Net gain from fair value adjustment of financial assets	45	99
Change in unrealized gains (losses) included in other comprehensive income	212	455
Ending balance	13,618	13,618
Changes in unrealized held at period end	212	455
Junior subordinated debentures [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	29,388	29,570
Net gain from fair value adjustment of financial liabilities	145	(34)
Change in accrued interest payable	2	(1)
Ending balance	$ 29,535	$ 29,535