Note 2 - Securities (Details) - Carrying Value of Securities at Maturity (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Carrying Value of Securities at Maturity [Abstract]
Due in one year or less	$ 50,587
Due after one year through five years	149,361
Due after five years through ten years	104,967
Due after ten years	50,666
Total debt securities	355,581
Equity securities	1,840
Total securities	$ 357,421	$ 353,678