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Deposits - Summary of Time Certificates of Deposit Accounts Included in Total Deposits and Their Remaining Maturities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Deposits [Abstract]  
2015 $ 52,773us-gaap_TimeDepositMaturitiesYearOne
2016 45,409us-gaap_TimeDepositMaturitiesYearTwo
2017 30,210us-gaap_TimeDepositMaturitiesYearThree
2018 27,772us-gaap_TimeDepositMaturitiesYearFour
2019 13,115us-gaap_TimeDepositMaturitiesYearFive
Thereafter 7,628us-gaap_TimeDepositMaturitiesAfterYearFive
Total $ 176,907us-gaap_TimeDeposits