Employee Benefit Plans (Components of Net Period Benefit Plans) (Details) - Postretirement health care benefit plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of the net periodic benefit cost
Service cost	$ 248	$ 302	$ 221
Interest cost	586	546	719
Expected return on plan assets	(911)	(911)	(911)
Recognized net actuarial loss	0	169	79
Net periodic benefit (gain) cost	$ (77)	$ 106	$ 108