Note 17 - Commitments and Credit Risk (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Note 17 - Commitments and Credit Risk (Details) [Line Items]
Letters of Credit Outstanding, Amount	27,073,000	$ 16,217,000
Credit Card Commitments to Extend Credit [Member]
Note 17 - Commitments and Credit Risk (Details) [Line Items]
Commitments and Contingencies	493,685,000	480,653,000
Other Loan Commitments to Extend Credit [Member]
Note 17 - Commitments and Credit Risk (Details) [Line Items]
Commitments and Contingencies	760,230,000	439,053,000
Standby Letters of Credit [Member]
Note 17 - Commitments and Credit Risk (Details) [Line Items]
Deferred Revenue	5,000	$ 13,000
Minimum [Member]
Note 17 - Commitments and Credit Risk (Details) [Line Items]
Letters of Credit Term	9 months
Maximum [Member]
Note 17 - Commitments and Credit Risk (Details) [Line Items]
Letters of Credit Term	15 years