Quarterly report pursuant to Section 13 or 15(d)

Allowance for Loan and Lease Losses - Additional Information (Details)

v3.8.0.1
Allowance for Loan and Lease Losses - Additional Information (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Loan
Dec. 31, 2017
USD ($)
Loan
Financing Receivable Recorded Investment Past Due [Line Items]    
Historical loss experience period 5 years  
Recorded investment, 90 days past due and still accruing   $ 33
Non-accrual loans, Past due $ 3,866 $ 3,562
Financing Receivables, Past Due Greater Than 90 Days or More and Still Accruing    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, 90 days past due and still accruing number of loans | Loan 0 1
Non-accrual loans, Past due $ 288 $ 427
Financing Receivables, 30 to 59 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Non-accrual loans, Past due 267 209
Financing Receivables, 60 to 89 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Non-accrual loans, Past due $ 213 $ 57