Investment Securities (Narrative) (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Available-for-sale Securities Pledged as Collateral	$ 339,665,000	$ 244,763,000
Debt Securities, Available-for-sale, Restriction Type [Extensible List]	us-gaap:CollateralPledgedMember	us-gaap:CollateralPledgedMember
FHLB [Member]
Schedule of Investments [Line Items]
Letter of credit outstanding, amount	$ 301,450,000	$ 450,850,000