Note 10 - Borrowed Funds (Details) - Non Callable Fixed Rate Securities Sold Under Agreement to Repurchase (Non Callable Fixed Rate Securities [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Note 10 - Borrowed Funds (Details) - Non Callable Fixed Rate Securities Sold Under Agreement to Repurchase [Line Items]
Number of agreement	4
Amount (in Dollars)	$ 200,000
Weighted average interest rate	2.78%
Maturity Range One to Three Years [Member]
Note 10 - Borrowed Funds (Details) - Non Callable Fixed Rate Securities Sold Under Agreement to Repurchase [Line Items]
Number of agreement	2
Amount (in Dollars)	100,000
Weighted average interest rate	2.71%
Maturity Range Three to Five Years [Member]
Note 10 - Borrowed Funds (Details) - Non Callable Fixed Rate Securities Sold Under Agreement to Repurchase [Line Items]
Number of agreement	2
Amount (in Dollars)	$ 100,000
Weighted average interest rate	2.86%