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Note 3 - Investment Securities Available For Sale (Detail) - Sales of Available for Sale Securities (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Proceeds from sales	$ 32,985	$ 24,127	$ 5,874
Gross realized gains	704	830	74
Gross realized losses	(94)	(809)	(29)
Impairment losses		$ (194)	$ (34)

X

- Definition

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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