Pension And Postretirement Benefits (Schedule Of Amounts Recognized In Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Accrued pension and postretirement benefits	$ (178,382)	$ (98,324)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other assets	59,891	74,477
Current liabilities	(1,169)	(640)
Accrued pension and postretirement benefits	(167,068)	(86,654)
Amounts recognized in the Consolidated Balance Sheets	(108,346)	(12,817)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	(1,248)	(1,438)
Accrued pension and postretirement benefits	(11,314)	(11,670)
Amounts recognized in the Consolidated Balance Sheets	$ (12,562)	$ (13,108)