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Deposits - Schedule of Maturities of Time Deposits (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Banking and Thrift [Abstract]  
2015 $ 141,078us-gaap_TimeDepositMaturitiesYearOne
2016 49,212us-gaap_TimeDepositMaturitiesYearTwo
2017 19,430us-gaap_TimeDepositMaturitiesYearThree
2018 26,146us-gaap_TimeDepositMaturitiesYearFour
2019 11,648us-gaap_TimeDepositMaturitiesYearFive
Thereafter 20,228us-gaap_TimeDepositMaturitiesAfterYearFive
Total $ 267,742us-gaap_TimeDeposits