Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Loans - 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, 2015
USD ($)
SecurityLoan
Dec. 31, 2014
USD ($)
SecurityLoan
Dec. 31, 2013
USD ($)
SecurityLoan
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 2 6 4
Recorded Investment | $ $ 590 $ 3,561 $ 338
Real estate loans [Member] | Retail [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 1 0
Recorded Investment | $ $ 0 $ 1,856 $ 0
Real estate loans [Member] | Gas station [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 0 1
Recorded Investment | $ $ 0 $ 0 $ 90
Real estate loans [Member] | Other [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 1 3 1
Recorded Investment | $ $ 412 $ 1,352 $ 125
Commercial and industrial loans [Member] | Commercial term [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 1 0 2
Recorded Investment | $ $ 178 $ 0 $ 123
Commercial and industrial loans [Member] | Commercial lines of credit [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Loans | SecurityLoan 0 2 0
Recorded Investment | $ $ 0 $ 353 $ 0