Loans (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans modified as debt restructurings | loan	0	0	3
Troubled debt restructuring, additional lending amount	$ 0	$ 0
Increase in allowance for loan losses for troubled debt restructurings			$ 149,000
Charge-offs due to troubled debt restructurings			$ 0
Number of loans that subsequently default after modification | loan	0	0	0
Threshold amount to individually evaluate loans for impairment	$ 250,000
Mortgage loans in process of foreclosure	0	$ 58,000
Loans Acquired with Deteriorated Credit Quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in allowance for loans that subsequently default after modification	400,000	33,000	$ 11,000
Loans Purchased
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses, reversal	$ 3,000	$ 36,000	$ 110,000