Investment Securities (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) security	Mar. 31, 2021 USD ($)
Proceeds from sale and maturity of marketable securities | $	$ 0	$ 0
Fair value adjustment recorded through earnings | $	$ 5,613	$ 3,998
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	54
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	153