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Note 5 - Fair Value Measurements (Detail) - Impairment Charges Recorded In Earnings (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Impaired Loans [Member]
Impairment charges:
Impaired loans	$ 584	$ 351	$ 5,817	$ 3,460
OREO [Member]
Impairment charges:
OREO	1,052	3,400	2,202	4,968
Total [Member]
Impairment charges:
Total	$ 1,636	$ 3,751	$ 8,019	$ 8,428

Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

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- 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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