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	3 Months Ended	9 Months Ended				3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013 REMIC And CMO [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2013 REMIC And CMO [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2013 Municipal [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2013 Municipal [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2014 Municipal [Member]	Jun. 30, 2014 Municipal [Member]	Dec. 31, 2013 Municipal [Member]	Sep. 30, 2013 Trust Preferred Securities [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2013 Trust Preferred Securities [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2014 Trust Preferred Securities [Member]	Sep. 30, 2014 Trust Preferred Securities [Member]	Sep. 30, 2013 Junior subordinated debentures [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2013 Junior subordinated debentures [Member] Fair Value, Inputs, Level 3 [Member]	Sep. 30, 2014 Junior subordinated debentures [Member]	Sep. 30, 2014 Junior subordinated debentures [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 22,930	$ 23,475	$ 9,327	$ 9,429	$ 12,453	$ 10,592	$ 9,223	$ 8,367	$ 6,650	$ 13,361	$ 14,935	$ 26,192	$ 23,922	$ 29,388	$ 29,570
Net gain from fair value adjustment of financial assets								(361)	150	45	99
Net loss from fair value adjustment of financial liabilities												272	2,547	145	(34)
Increase in accrued interest payable												1	(4)	(2)	1
Other-than-temporary impairment charge	(916)	(1,419)
Change in unrealized gains (losses) included in other comprehensive income	(1,820)	(1,862)	(52)	(154)				(500)	706	212	455
Ending balance	20,194	20,194	9,275	9,275	12,453	10,592	9,223	7,506	7,506	13,618	13,618	26,465	26,465	29,535	29,535
Changes in unrealized held at period end	$ (1,820)	$ (1,862)	$ (52)	$ (154)				$ (500)	$ 706	$ 212	$ 455