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Loans - Changes in Servicing Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Transfers And Servicing [Abstract]
Balance at Beginning of Period	$ 5,542	$ 3,720
Additions	(791)
Amortization	(329)	(205)
Balance at End of Period	$ 6,004	$ 3,515

The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

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- Definition

Fair value as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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