Employee Benefit Plans (Schedule of Net Period Benefit Cost and Other Amounts Recognized in Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Changes in funded status recognized in other comprehensive loss, before taxes
Total recognized in OCI, before taxes	$ (3,782)	$ (850)	$ 605
Supplemental Executive Retirement Plan [Member]
Net period benefit cost
Service cost	534	504	464
Interest cost	460	389	460
Recognized net actuarial loss(2)	859	778	623
Amortization of prior service credit(2)	0	0	0
Net periodic benefit cost	1,853	1,671	1,547
Changes in funded status recognized in other comprehensive loss, before taxes
Net actuarial (gain) loss arising during period	(1,996)	222	911
Amortization of net unrecognized actuarial loss	(859)	(778)	(623)
Amortization of prior service credit	0	0	0
Total recognized in OCI, before taxes	(2,855)	(556)	288
Total recognized in net periodic benefit cost and OCI, before taxes	(1,002)	1,115	1,835
Other Postretirement Benefits Plan [Member]
Net period benefit cost
Service cost	21	26	28
Interest cost	111	103	123
Recognized net actuarial loss(2)	88	116	78
Amortization of prior service credit(2)	(24)	(24)	(24)
Net periodic benefit cost	196	221	205
Changes in funded status recognized in other comprehensive loss, before taxes
Net actuarial (gain) loss arising during period	(863)	(202)	371
Amortization of net unrecognized actuarial loss	(88)	(116)	(78)
Amortization of prior service credit	24	24	24
Total recognized in OCI, before taxes	(927)	(294)	317
Total recognized in net periodic benefit cost and OCI, before taxes	$ (731)	$ (73)	$ 522