Note 7 - Loans (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Note 7 - Loans (Details) [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 188,347,000	$ 200,780,000
Percentage Of Charge-Off To Contractual Balances For Impaired Loans	12.60%	23.90%
Financing Receivable, Modifications, Recorded Investment	34,162,000	38,769,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	62,000
Reduction Of Stated Interest Rate Member | Minimum [Member]
Note 7 - Loans (Details) [Line Items]
Troubled Debt Restructurings Length of Modifications	7 months
Reduction Of Stated Interest Rate Member | Maximum [Member]
Note 7 - Loans (Details) [Line Items]
Troubled Debt Restructurings Length of Modifications	2 years
Nonaccrual Loans [Member]
Note 7 - Loans (Details) [Line Items]
Impaired Financing Receivable, Recorded Investment	65,200,000	83,200,000
Accruing Troubled Debt Restructuring [Member]
Note 7 - Loans (Details) [Line Items]
Impaired Financing Receivable, Recorded Investment	123,100,000	117,600,000
Financing Receivable, Modifications, Recorded Investment	123,089,000	117,597,000
Accruing Troubled Debt Restructuring [Member]
Note 7 - Loans (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	123,100,000	117,600,000
Allowance for Credit Losses, Change in Method of Calculating Impairment	8,000,000	6,900,000
Non Accruing Troubled Debt Restructuring Member
Note 7 - Loans (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	34,200,000	38,800,000
Allowance for Credit Losses, Change in Method of Calculating Impairment	$ 3,900,000	$ 2,200,000
Minimum [Member]
Note 7 - Loans (Details) [Line Items]
Period Loan Is In Payment Default	60 days
Maximum [Member]
Note 7 - Loans (Details) [Line Items]
Period Loan Is In Payment Default	90 days