Investment Securities (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) security	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) security	Jun. 30, 2021 USD ($)
Proceeds from sale and maturity of marketable securities | $	$ 0	$ 0	$ 0	$ 0
Fair value adjustment recorded through earnings | $			$ 13,112	$ 8,029
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	105		105
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	164		164