Loans (Summary of TDRs with a Payment Default During the Period) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan	Dec. 31, 2016 USD ($) loan
Troubled debt restructurings on financing receivables with defaults payment
Number of loans (in loan) | loan	27	22	16
Principal balance at year end | $	$ 1,621	$ 2,051	$ 1,980
Commercial Loan Portfolio
Troubled debt restructurings on financing receivables with defaults payment
Number of loans (in loan) | loan	9	5	2
Principal balance at year end | $	$ 1,208	$ 1,617	$ 1,721
Consumer Loan Portfolio
Troubled debt restructurings on financing receivables with defaults payment
Number of loans (in loan) | loan	18	17	14
Principal balance at year end | $	$ 413	$ 434	$ 259
Commercial | Commercial Loan Portfolio
Troubled debt restructurings on financing receivables with defaults payment
Number of loans (in loan) | loan	6	5	0
Principal balance at year end | $	$ 700	$ 1,617	$ 0
Commercial Real Estate | Commercial Loan Portfolio
Troubled debt restructurings on financing receivables with defaults payment
Number of loans (in loan) | loan	3	0	2
Principal balance at year end | $	$ 508	$ 0	$ 1,721