Securities (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) state	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]
Number of states with highest volume of state and political subdivision securities | state	5
Accrued Interest Receivable Debt Securities Available for Sale	$ 2,200		$ 1,700
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Accrued Interest Receivable Debt Security Held to Maturity	937,000		1,200
Debt Securities, Held-to-maturity, Noncurrent	0		0
Debt Securities, Held-to-maturity, Nonaccrual	0		0
Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities	0	$ 1,000
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 0		$ 0