Note 3 - Investment Securities (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Note 3 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	$ 366,119,000	$ 68,166,000
Pledged Financial Instruments, Not Separately Reported, Securities	773,297,000	778,588,000
US Government-sponsored Enterprises Debt Securities [Member] | Call Option [Member] | Interest Coupons [Member]
Note 3 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	89,821
US Government-sponsored Enterprises Debt Securities [Member] | Call Option [Member]
Note 3 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	$ 255,634