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Fair Value Measurements - Summary of Assets Measured at Fair Value on a Nonrecurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Assets    
Other real estate owned, net $ 1,807 $ 3,030
Fair Value, Measurements, Nonrecurring [Member]
   
Assets    
Impaired loans, net 2,812 3,972
Other real estate owned, net 1,807 3,030
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Assets    
Impaired loans, net 2,812 3,972
Other real estate owned, net $ 1,807 $ 3,030