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Note 3 - Trading Account Assets (Details) - Net Realized and Change in Net Unrealized Gains on Trading Account Assets (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Gain (Loss) on Investments [Line Items]
Total trading account income, net	$ 175	$ 346
Trading, Municipal Bonds [Member]
Gain (Loss) on Investments [Line Items]
Realized gains, net	138	316
Unrealized gains, net due to changes in fair value relative to assets held at end of period	37	30
Total trading account income, net	$ 175	$ 346

Amount of gain (loss) resulting from the difference between the acquisition price and the selling price or fair value of trading assets and trading liabilities, conducted separately from customer trading activities. Includes, but is not limited to, changes in fair value of trading assets and trading liabilities.

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