Retirement Plans (Summary Of Expected Federal Subsidy) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Year one	$ 0	$ 0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Next five years	0	0
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Next five years	0	0
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Year one	(14)	(15)
Year two	(14)	(15)
Year three	(14)	(15)
Year four	(14)	(15)
Year five	(14)	(15)
Next five years	$ (62)	$ (67)