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Note 3 - Investment Securities Available for Sale (Details) (USD $)
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12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
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| Table Text Block [Abstract] | |||
| Proceeds from Sale of Available-for-sale Securities | $ 1,254,000 | $ 50,578,000 | $ 167,805,000 |
| Available-for-sale Securities, Gross Realized Gain (Loss) | 100,000 | 500,000 | 5,000,000 |
| Contractual Maturities | 30 years | ||
| Available For Sale Securities Portfolio Life | 7 years 10 days | 4 years 302 days | |
| Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | $ 200,000 | $ 0 | $ 300,000 |