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Note 6 - Fair Value Measurements (Detail) - Impairment Charges on Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Impairment charges:
Impaired loans	$ (505)	$ (2,470)
Total	1,388	4,809
Impaired Loans [Member]
Impairment charges:
Impaired loans	371	4,306
OREO [Member]
Impairment charges:
OREO	$ 1,017	$ 503

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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