Securities (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) state security	Dec. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($)
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
State and Political Subdivisions Securities, Number of States with Highest Volume | state	5
Debt Securities, Held-to-maturity, Past Due	$ 0
Debt Securities, Held-to-maturity, Nonaccrual	0
Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities	$ 1,000	$ 0	$ 0
Debt Securities, Available-for-sale [Line Items]
State and Political Subdivisions Securities, Number of States with Highest Volume | state	5
Securities pledged to secure public deposits and other purposes	$ 162,800	$ 86,100
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	78	88
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ 0
Accrued Interest Receivable Debt Securities Available for Sale	1,700	$ 1,900
Accrued Interest Receivable Debt Securities Held to Maturity	$ 1,200
Residential Mortgage Backed Securities [Member] | Minimum [Member]
Debt Securities, Available-for-sale [Line Items]
Contractual maturity	4 years
Estimated average life to maturity	1 month
Residential Mortgage Backed Securities [Member] | Maximum [Member]
Debt Securities, Available-for-sale [Line Items]
Contractual maturity	48 years
Estimated average life to maturity	17 years