v3.19.1
Loans Receivable - Outstanding Loan Commitments (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Off-balance sheet risk, allowance $ 1,053 $ 901
Commitments to Extend Credit    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 209,209 180,699
Letters of credit 6,216 6,759
Commitments to Extend Credit | Commercial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 52,083 46,580
Commitments to Extend Credit | Commercial real estate | Real estate:    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 8,980 7,530
Commitments to Extend Credit | Commercial real estate | Construction commitments    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 6,358 7,350
Commitments to Extend Credit | Residential real estate | Real estate:    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 12,853 7,072
Commitments to Extend Credit | Residential real estate | Construction commitments    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 72,424 56,463
Commitments to Extend Credit | Residential real estate | Loans Held For Sale    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 647 4,138
Commitments to Extend Credit | Consumer | Home equity    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 27,243 25,395
Commitments to Extend Credit | Consumer | Secured credit card    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit 29,142 30,161
Commitments to Extend Credit | Consumer | Personal    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unused lines of credit $ 126 $ 148