Quarterly report pursuant to Section 13 or 15(d)

Loans - Troubled Debt Restructurings, Disaggregated by Loan Class (Detail)

v3.4.0.3
Loans - Troubled Debt Restructurings, Disaggregated by Loan Class (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2016
USD ($)
SecurityLoan
Mar. 31, 2015
USD ($)
SecurityLoan
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 3 4
Pre-Modification Outstanding Recorded Investment $ 235 $ 543
Post-Modification Outstanding Recorded Investment $ 229 $ 508
Real estate loans [Member] | Retail [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 1 0
Pre-Modification Outstanding Recorded Investment $ 21 $ 0
Post-Modification Outstanding Recorded Investment 20 $ 0
Loan modifications made through reduction of principal or accrued interest payments $ 20  
Commercial and industrial loans [Member] | Commercial term [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 2 4
Pre-Modification Outstanding Recorded Investment $ 214 $ 543
Post-Modification Outstanding Recorded Investment 209 508
Loan modification made through deferrals principal payment 152  
Amount of loan modification through extension of maturity $ 57 $ 508