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				3 Months Ended
	Mar. 31, 2013 REMIC And CMO [Member]	Mar. 31, 2013 Municipal [Member]	Mar. 31, 2014 Municipal [Member]	Dec. 31, 2013 Municipal [Member]	Mar. 31, 2014 Trust Preferred Securities [Member]	Mar. 31, 2013 Trust Preferred Securities [Member]	Mar. 31, 2014 Junior subordinated debentures [Member]	Mar. 31, 2013 Junior subordinated debentures [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 23,475	$ 9,429	$ 10,170	$ 9,223	$ 14,935	$ 6,650	$ 29,570	$ 23,922
Net gain from fair value adjustment of financial assets					25	247
Net loss from fair value adjustment of financial liabilities							(25)	819
Increase in accrued interest payable							(4)	1
Change in unrealized gains (losses) included in other comprehensive income	286	(51)			(30)	530
Ending balance	23,761	9,378	10,170	9,223	13,059	7,427	29,541	24,742
Changes in unrealized held at period end	$ 286	$ (51)			$ (30)	$ 530