Employee Benefit Plans (Summary Of Expected Benefit Payments) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Share-based Payment Arrangement, Noncash Expense [Abstract]
Defined Benefit Plan, Expected Future Benefit Payment, Year One	$ 986
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	984
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	989
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	978
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	993
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years	$ 4,680