Note 10 - Fair Value of Financial Instruments (Details) - Level 3 fair value reconciliation: (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
REMIC And CMO [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, carried at fair value on a recurring basis classified within Level 3	$ 23,475
Changes in unrealized held at period end	(42)
Other-than-temporary impairment charge	(503)
Change in unrealized gains (losses) included in other comprehensive income	(42)
Assets, carried at fair value on a recurring basis classified within Level 3	22,930
Municipal [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, carried at fair value on a recurring basis classified within Level 3	9,429
Changes in unrealized held at period end	(102)
Change in unrealized gains (losses) included in other comprehensive income	(102)
Assets, carried at fair value on a recurring basis classified within Level 3	9,327
Trust Preferred Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, carried at fair value on a recurring basis classified within Level 3	6,650
Changes in unrealized held at period end	1,205
Net gain from fair value adjustment of financial assets	512
Change in unrealized gains (losses) included in other comprehensive income	1,205
Assets, carried at fair value on a recurring basis classified within Level 3	8,367
Junior subordinated debentures [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Liabilities, carried at fair value on a recurring basis classified within Level 3	23,922
Net loss from fair value adjustment of financial liabilities	2,275
Decrease in accrued interest payable	(5)
Liabilities, carried at fair value on a recurring basis classified within Level 3	$ 26,192