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	6 Months Ended	3 Months Ended	6 Months Ended				3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014 REMIC And CMO [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 REMIC And CMO [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 Municipal [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 Municipal [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 Municipal [Member]	Mar. 31, 2014 Municipal [Member]	Dec. 31, 2013 Municipal [Member]	Jun. 30, 2014 Trust Preferred Securities [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 Trust Preferred Securities [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 Trust Preferred Securities [Member]	Jun. 30, 2014 Trust Preferred Securities [Member]	Jun. 30, 2014 Junior subordinated debentures [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 Junior subordinated debentures [Member] Fair Value, Inputs, Level 3 [Member]	Jun. 30, 2014 Junior subordinated debentures [Member]	Jun. 30, 2014 Junior subordinated debentures [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 23,761	$ 23,475	$ 9,378	$ 9,429	$ 10,592	$ 10,170	$ 9,223	$ 7,427	$ 6,650	$ 13,059	$ 14,935	$ 24,742	$ 23,922	$ 29,541	$ 29,570
Net gain from fair value adjustment of financial assets								265	512	29	55
Net loss from fair value adjustment of financial liabilities												1,456	2,275	(154)	(179)
Increase in accrued interest payable												(6)	(5)	(1)	3
Other-than-temporary impairment charge	(503)	(503)
Change in unrealized gains (losses) included in other comprehensive income	(328)	(42)	(51)	(102)				675	1,205	273	242
Ending balance	22,930	22,930	9,327	9,327	10,592	10,170	9,223	8,367	8,367	13,361	13,361	26,192	26,192	29,388	29,388
Changes in unrealized held at period end	$ (328)	$ (42)	$ (51)	$ (102)				$ 675	$ 1,205	$ 273	$ 242