Employee Benefit Plans (Components of Net Period Benefit Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Components of the net periodic benefit cost
Service cost	$ 0	$ 0	$ 0
Interest cost	6	48	116
Expected return on plan assets	0	0	0
Recognized net actuarial loss	266	248	232
Net periodic benefit cost	272	296	348
Postretirement Benefits
Components of the net periodic benefit cost
Service cost	302	221	365
Interest cost	546	719	854
Expected return on plan assets	(911)	(911)	(911)
Recognized net actuarial loss	169	79	0
Net periodic benefit cost	$ 106	$ 108	$ 308