Note 3 - Investment Securities Available for Sale (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Investments, Debt and Equity Securities [Abstract]
Debt Securities Weighted Average Duration	4 years 6 months
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	$ 11,246,000	$ 10,694,000	$ 12,031,000
Available-for-sale Securities Pledged as Collateral	$ 260,700,000