Employee Benefit Plans (Components Of Net Periodic Benefit Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Service cost	$ 3,485	$ 4,196	$ 3,693
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Labor and Related Expense	Labor and Related Expense	Labor and Related Expense
Interest cost on projected benefit obligation	$ 2,588	$ 2,202	$ 2,537
Expected return on plan assets	(4,565)	(5,225)	(5,136)
Amortization of unrecognized loss	250	724	1,270
Net periodic pension cost	$ 1,758	$ 1,897	$ 2,364