Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Expected Benefit Payments And Medicare Subsidy Receipts For Next Five Years And Thereafter) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Prescription Drug Subsidy Receipts, Fiscal Year Maturity [Abstract]
Medicare subsidy receipts in 2013	$ 1,507
Medicare subsidy receipts in 2014	1,716
Medicare subsidy receipts in 2015	1,988
Medicare subsidy receipts in 2016	2,224
Medicare subsidy receipts in 2017	2,466
Medicare subsidy receipts in 2018-2022	16,125
Pension Plan Assets [Member]
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected benefit payments in 2013	68,418
Expected benefit payments in 2014	69,178
Expected benefit payments in 2015	70,098
Expected benefit payments in 2016	71,508
Expected benefit payments in 2017	73,150
Expected benefit payments in 2018-2022	430,427
SERPA Benefits [Member]
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected benefit payments in 2013	2,549
Expected benefit payments in 2014	1,440
Expected benefit payments in 2015	1,895
Expected benefit payments in 2016	1,880
Expected benefit payments in 2017	2,014
Expected benefit payments in 2018-2022	16,506
Postretirement Healthcare Benefits [Member]
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected benefit payments in 2013	30,694
Expected benefit payments in 2014	31,047
Expected benefit payments in 2015	30,644
Expected benefit payments in 2016	29,817
Expected benefit payments in 2017	28,785
Expected benefit payments in 2018-2022	$ 147,623