Summary of Significant Accounting Policies (Schedule of Other, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Interest and dividend income	$ 1,920	$ 5,621	$ 11,085
Net gains recognized on investment securities	9,384	1,818	7,440
Net periodic benefit cost other than the service costs	(975)	(3,618)	(2,298)
Credit loss expense	0	(12,828)	0
Other income	358	361	352
Other, net	$ 10,687	$ (8,646)	$ 16,579