Securities (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) security	Dec. 31, 2020 USD ($) security
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Accrued interest receivable	$ 2,200	$ 2,400
Fair value of available for sale and held to maturity securities pledged as collateral	344,300	$ 291,900
Amortized cost of callable debt securities	204,800
Fair value of callable debt securities	$ 201,300
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	70	30
Number of debt securities below investment grade | security	2
Individual name issuer trust preferred debt securities
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	3	5
Securities in unrealized loss position, number of companies issuing securities | security	3
Amortized cost of trust preferred securities of individual name issuers that are below investment grade	$ 4,000
Unrealized losses of trust preferred securities of individual name issuers that are below investment grade	$ 140
Corporate bonds [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security	4	3
Available for Sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Accumulated Investments	$ (782)
Minimum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Maturity period of callable debt securities	3 years
Call features of callable debt securities	1 month
Maximum [Member]
Schedule of Available for Sale and Held to Maturity Securities [Line Items]
Maturity period of callable debt securities	15 years
Call features of callable debt securities	1 year