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Note 11 - 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 - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Municipals Debt Securities [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Beginning balance $ 7,899 $ 10,592 $ 15,519 $ 9,223
Purchases   2,000 1,000 4,475
Transfer to held-to-maturity 0   (4,510)  
Principal repayments (7,899) (54) (8,009) (160)
Sales       0
Maturities 0 (85) (4,000) (1,085)
Net gain from fair value adjustment of financial liabilities [1] 0 0 0 0
Net gain from fair value adjustment of financial assets [1] 0 0 0 0
Decrease in accrued interest payable 0 0 0 0
Change in unrealized gains included in other comprehensive income 0 0 0 0
Ending balance 0 12,453 0 12,453
Changes in unrealized held at period end 0 0 0 0
Trust Preferred Securities [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Beginning balance 7,226 13,361 7,090 14,935
Purchases   $ 0 0 0
Transfer to held-to-maturity 0   0  
Principal repayments 0 0 0
Sales       (1,871)
Maturities 0 $ 0 0 0
Net gain from fair value adjustment of financial liabilities [1] (44) 45 86 99
Net gain from fair value adjustment of financial assets [1] 0 0 0 0
Decrease in accrued interest payable 0 0 0 0
Change in unrealized gains included in other comprehensive income (1) 212 5 455
Ending balance 7,181 13,618 7,181 13,618
Changes in unrealized held at period end (1) 212 5 455
Junior Subordinated Debentures [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Beginning balance 29,476 29,388 28,771 29,570
Purchases   0 0 0
Transfer to held-to-maturity 0   0  
Principal repayments 0 0 0 0
Sales       0
Maturities 0 0 0 0
Net gain from fair value adjustment of financial liabilities [1] 0 0 0 0
Net gain from fair value adjustment of financial assets [1] (988) 145 (283) (34)
Decrease in accrued interest payable 3 2 3 (1)
Change in unrealized gains included in other comprehensive income 0 0 0 0
Ending balance $ 28,491 29,535 28,491 29,535
Changes in unrealized held at period end   $ 0 $ 0 $ 0
[1] These totals in the table above are presented in the Consolidated Statement of Income under net gains (losses) from fair value adjustments.