Fair Values of Financial Instruments - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements using Significant Unobservable Level 3 Inputs (Details) - Recurring - Available for Sale Securities - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Available for Sale Securities
Beginning Balance	$ 2,479	$ 2,893
Included in other comprehensive income	227	16
Purchases, issuances, and settlements	3,241	0
Principal payments	(456)	(430)
Ending balance	$ 5,491	$ 2,479