Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Loans - Troubled Debt Restructurings, Disaggregated by Loan Class (Detail)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
USD ($)
SecurityLoan
Sep. 30, 2015
USD ($)
SecurityLoan
Sep. 30, 2016
USD ($)
SecurityLoan
Sep. 30, 2015
USD ($)
SecurityLoan
Financing Receivable, Modifications [Line Items]        
Number of Loans | SecurityLoan 1 7 5 14
Pre-Modification Outstanding Recorded Investment $ 100 $ 2,062 $ 356 $ 3,281
Post-Modification Outstanding Recorded Investment $ 89 $ 2,036 319 $ 3,061
Loan modifications made through reduction of principal or accrued interest payments     $ 23,000  
Real estate loans [Member] | Retail [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans | SecurityLoan 0 1 1 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 1,230 $ 21 $ 1,248
Post-Modification Outstanding Recorded Investment $ 0 $ 1,228 $ 23 1,228
Loan modifications made through reduction of principal or accrued interest payments       $ 1,200
Real estate loans [Member] | Other [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans | SecurityLoan 0 1 0 2
Pre-Modification Outstanding Recorded Investment $ 0 $ 412 $ 0 $ 731
Post-Modification Outstanding Recorded Investment $ 0 412 $ 0 725
Loan modifications made through reduction of principal or accrued interest payments   $ 1,200    
Loan modification made through deferrals principal payment       $ 725
Commercial and industrial loans [Member] | Commercial term [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans | SecurityLoan 1 5 4 10
Pre-Modification Outstanding Recorded Investment $ 100 $ 420 $ 335 $ 1,052
Post-Modification Outstanding Recorded Investment 89 396 296 858
Loan modifications made through reduction of principal or accrued interest payments $ 89,000   89 71
Loan modification made through deferrals principal payment   412 154 38,000
Amount of loan modification through extension of maturity     $ 53 $ 749
Consumer loans [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans | SecurityLoan     0 1
Pre-Modification Outstanding Recorded Investment     $ 0 $ 250
Post-Modification Outstanding Recorded Investment     $ 0 250
Loan modifications made through reduction of principal or accrued interest payments   31,000    
Loan modification made through deferrals principal payment   71   $ 250
Amount of loan modification through extension of maturity   $ 293,000