Annual report pursuant to Section 13 and 15(d)

Loans and Leases - Troubled Debt Restructurings that Defaulted Subsequent to Modifications Occurring Within Previous Twelve Months, Disaggregated by Loan Class (Detail)

v3.6.0.2
Loans and Leases - Troubled Debt Restructurings that Defaulted Subsequent to Modifications Occurring Within Previous Twelve Months, 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 1 2 6
Recorded Investment | $ $ 50 $ 590 $ 3,561
Real estate loans [Member] | Retail [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 0 1
Recorded Investment | $ $ 0 $ 0 $ 1,856
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 0 0
Recorded Investment | $ $ 0 $ 0 $ 0
Real estate loans [Member] | Other [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 1 3
Recorded Investment | $ $ 0 $ 412 $ 1,352
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 1 1 0
Recorded Investment | $ $ 50 $ 178 $ 0
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 0 2
Recorded Investment | $ $ 0 $ 0 $ 353