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Note 2 - Accounting Policy (Detail) (USD $)	3 Months Ended
Note 2 - Accounting Policy (Detail) (USD $)	Mar. 31, 2012
Impaired Loan Change	$ 28,000,000
Impact of Method Change [Member]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	(2,900,000)
Impact Related to Impaired Loans [Member]
Allowance for Loan and Lease Losses, Provision for Loss, Gross	$ 945,000

Reflects the gross amount charged against earnings during the period as credit losses (bad debt expense) based on review of the loan and lease portfolio and application of the methodology for estimating credit losses.

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