Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
Loans - Troubled Debt Restructurings that Defaulted Subsequent to Modifications Occurring Within Previous Twelve Months, 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
Recorded Investment | $ $ 749 $ 4,325
Real estate loans [Member] | Retail [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 0 1
Recorded Investment | $ $ 0 $ 1,832
Real estate loans [Member] | Gas station [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 0 1
Recorded Investment | $ $ 0 $ 1,990
Real estate loans [Member] | Other [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 2 1
Recorded Investment | $ $ 719 $ 379
Commercial and industrial loans [Member] | Commercial term [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 1 0
Recorded Investment | $ $ 30 $ 0
Commercial and industrial loans [Member] | Commercial lines of credit [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Loans | SecurityLoan 0 1
Recorded Investment | $ $ 0 $ 124