Debt Securities (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) security item	Dec. 31, 2020 USD ($) item
Debt Securities [Abstract]
Realized gains or losses on sales and calls | $	$ 0.0	$ 0.0
Securities of issuers whose aggregate carrying amount exceeded 10% | item	0	0
Securities pledged to secure available borrowings with the Federal Reserve Bank and Federal Home Loan Bank | $	$ 14.4	$ 21.3
Securities in portfolio | security	57
Securities in portfolio, unrealized loss position | security	6