Securities (Narrative) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) security $ / shares shares	Dec. 31, 2021 USD ($) security
Debt and Equity Securities, FV-NI [Line Items]
Private mortgage-backed security fair value	$ 800	$ 900
Debt securities, available-for-sale and held-to-maturity, number of positions | security	669	648
Number of securities held in an unrealized loss position | security	641	371
Investment securities, pledged as collateral for public deposits	$ 731,700	$ 951,400
FHLB stock and FRB stock, cost	36,200	22,300
FHLB, cost	11,300	4,600
FRB stock	$ 24,900	$ 17,800
Visa, Inc | Common Class B
Debt and Equity Securities, FV-NI [Line Items]
Stock owned (in shares) | shares	12,356
Carrying value of shares	$ 0
Visa, Inc | Common Class A
Debt and Equity Securities, FV-NI [Line Items]
Conversion price (in dollars per share) | $ / shares	$ 1.61
Conversion of stock (in shares) | shares	19,843