Loans (Nonaccrual loans) (Details 3) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Residential mortgage loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	$ 55	$ 55
Residential mortgage loans | Secured by one-to-four family residences
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	55	55
Commercial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	989	45
Commercial loans | Real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	944	0
Commercial loans | Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	45	45
Consumer loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	1,044	100
Consumer loans | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	$ 0	$ 0