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)

v3.8.0.1
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
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 1 2
Recorded Investment | $ $ 50 $ 590
Real estate loans [Member] | Other [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 0 1
Recorded Investment | $ $ 0 $ 412
Commercial and industrial loans [Member] | Commercial term [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 1 1
Recorded Investment | $ $ 50 $ 178