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Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Beginning of Period [Member] | Accruing Troubled Debt Restructuring [Member]
        
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]        
Beginning balance $ 118,922 $ 130,215 $ 117,597 $ 144,695
Ending balance 118,922 130,215 117,597 144,695
Beginning of Period [Member] | Non Accruing Troubled Debt Restructuring Member
        
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]        
Beginning balance 37,797 49,878 38,769 47,731
Ending balance 37,797 49,878 38,769 47,731
End of Period [Member] | Accruing Troubled Debt Restructuring [Member]
        
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]        
Beginning balance 111,136 115,464 111,136 115,464
Ending balance 111,136 115,464 111,136 115,464
End of Period [Member] | Non Accruing Troubled Debt Restructuring Member
        
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]        
Beginning balance 43,605 48,524 43,605 48,524
Ending balance 43,605 48,524 43,605 48,524
Accruing Troubled Debt Restructuring [Member]
        
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]        
New restructurings 722   8,097 4,816
Restructured loans restored to accrual status   824 962 1,454
Charge-offs   (78)   (78)
Payments (1,278) (15,497) (8,290) (33,389)
Restructured loans placed on nonaccrual (7,230)   (7,230) (2,034)
Non Accruing Troubled Debt Restructuring Member
        
Note 7 - Loans (Details) - Activity Within the Troubled Debt Resturing Loans [Line Items]        
New restructurings 247 1,686 1,786 3,748
Restructured loans restored to accrual status   (824) (962) (1,454)
Charge-offs (595) (254) (599) (933)
Payments (1,074) (1,962) (2,619) (2,602)
Restructured loans placed on nonaccrual $ 7,230   $ 7,230 $ 2,034