Employee Benefit Plans (Components of Net Period Benefit Plans) (Details) - Postretirement health care benefit plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of the net periodic benefit cost
Service cost	$ 151	$ 248	$ 302
Interest cost	830	586	546
Expected return on plan assets	(911)	(911)	(911)
Recognized net actuarial (gain) loss	(323)	0	169
Net periodic benefit (gain) cost	$ (253)	$ (77)	$ 106