Note 9 - Derivative Financial Instruments (Details) - Non-hedging Interest Rate Derivatives (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Non-hedging interest rate derivative:
Other non-interest income	$ 1,944	$ 1,760	$ 3,594	$ 3,563
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Non-hedging interest rate derivative:
Other non-interest income	$ 34	$ (75)	$ 42	$ (108)