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Federally Assisted Acquisition of San Joaquin Bank - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 6 Months Ended
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Jun. 30, 2013
Business Combinations [Abstract] |
Remaining discount associated with SJB loans | $ 17.5
Expected cash flows | 10.0
Remaining average lives of loan | 4 years 8 months 12 days
Remaining average lives of loan | 7 months 6 days
FDIC loss sharing asset | $ 10.6
Maximum contract life | 1 year 3 months 18 days

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- Details
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