Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Loans and Leases - Troubled Debt Restructurings, Disaggregated by Loan Class (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
USD ($)
SecurityLoan
Dec. 31, 2015
USD ($)
SecurityLoan
Dec. 31, 2014
USD ($)
SecurityLoan
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 7 14 17
Pre-Modification Outstanding Recorded Investment $ 4,188 $ 3,178 $ 10,383
Post-Modification Outstanding Recorded Investment $ 4,076 $ 3,002 $ 9,830
Real estate loans [Member] | Retail [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 1 1 2
Pre-Modification Outstanding Recorded Investment $ 21 $ 1,230 $ 2,205
Post-Modification Outstanding Recorded Investment 23 1,227 2,032
Loan modifications made through reduction of principal or accrued interest payments $ 23    
Loan modification made through deferrals principal payment   $ 1,200 $ 2,000
Real estate loans [Member] | Hotel/motel [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 1 0 1
Pre-Modification Outstanding Recorded Investment $ 3,764 $ 0 $ 832
Post-Modification Outstanding Recorded Investment 3,722 $ 0 821
Loan modification made through deferrals principal payment $ 3,700   $ 821
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 0 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 2,040
Post-Modification Outstanding Recorded Investment $ 0 $ 0 1,979
Loan modification made through deferrals principal payment     $ 2,000
Real estate loans [Member] | Other [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 2 3
Pre-Modification Outstanding Recorded Investment $ 0 $ 725 $ 1,422
Post-Modification Outstanding Recorded Investment $ 0 724 1,352
Loan modifications made through reduction of principal or accrued interest payments     385
Loan modification made through deferrals principal payment   $ 724 943
Amount of loan modification through extension of maturity     $ 24
Real estate loans [Member] | Residential property [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 0 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 317
Post-Modification Outstanding Recorded Investment $ 0 $ 0 308
Amount of loan modification through extension of maturity     $ 308
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 5 10 5
Pre-Modification Outstanding Recorded Investment $ 403 $ 973 $ 721
Post-Modification Outstanding Recorded Investment 331 801 629
Loan modifications made through reduction of principal or accrued interest payments 65 60 184
Loan modification made through deferrals principal payment 216 34  
Amount of loan modification through extension of maturity $ 50 $ 707 $ 445
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 0 3
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 2,366
Post-Modification Outstanding Recorded Investment $ 0 $ 0 2,509
Loan modifications made through reduction of principal or accrued interest payments     126
Loan modification made through deferrals principal payment     $ 2,400
Commercial and industrial loans [Member] | International loans [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 0 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 480
Post-Modification Outstanding Recorded Investment $ 0 $ 0 200
Loan modifications made through reduction of principal or accrued interest payments     $ 200
Consumer loans [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 1 0
Pre-Modification Outstanding Recorded Investment $ 0 $ 250 $ 0
Post-Modification Outstanding Recorded Investment $ 0 250 $ 0
Loan modification made through deferrals principal payment   $ 250