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
	Mar. 31, 2014	Mar. 31, 2013
Municipal [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 9,223	$ 9,429
Purchases	2,000
Principal repayments	(1,053)
Change in unrealized gains (losses) included in other comprehensive income		(51)
Ending balance	10,170	9,378
Changes in unrealized held at period end		(51)
Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	14,935	6,650
Sales	(1,871)
Net gain from fair value adjustment of financial assets	25	247
Change in unrealized gains (losses) included in other comprehensive income	(30)	530
Ending balance	13,059	7,427
Changes in unrealized held at period end	(30)	530
Junior subordinated debentures [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	29,570	23,922
Net loss from fair value adjustment of financial liabilities	(25)	819
Decrease in accrued interest payable	(4)	1
Ending balance	$ 29,541	$ 24,742