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Troubled Debt Restructures - Additional Information (Detail)
6 Months Ended
Jun. 30, 2016
USD ($)
SecurityLoan
Jun. 30, 2015
USD ($)
Receivables [Abstract]    
Troubled debt restructuring outstanding $ 4,400,000  
Troubled debt restructuring on non-accrual basis $ 230,000  
Number of troubled debt restructured loans in non accrual status | SecurityLoan 1  
TDR's which was default payment $ 0 $ 0
TDR is defined as being past due 90 days  
Allowance for loan loss on TDR $ 164,000 $ 186,000