Aggregate Amount of Loans to Related Parties (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Related Party Transaction [Line Items]
Beginning Balance	$ 7,782
Change in composition	211
New loans, including renewals	4,731
Payments, etc., including renewals	4,701
Ending Balance	$ 8,023

For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

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Reflects the amount of new advances made to related parties in the form of loan and lease receivables.

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- Definition

Reflects the amount of collections received from related parties to reduce the carrying amounts of loans and leases receivable due from them.

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- Definition

Reflects the sum for the period of the additions and reductions to related party loans, which when added to the opening balance of related party loan will agree to the ending balance of such loans. This subtotal typically is not reflected.

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