Note 9 - Derivative Financial Instruments (Details) - Non-hedging Interest Rate Derivatives (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Non-hedging interest rate derivative:
Other non-interest income	$ 2,089	$ 1,872	$ 5,683	$ 5,435
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Non-hedging interest rate derivative:
Other non-interest income	$ (19)	$ (31)	$ 22	$ (139)