Pension Plans And Other Post-Retirement Benefits (Schedule Of Accumulated And Projected Benefit Obligations) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Projected Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 303,077	$ 237,087
Fair value of plan assets	190,084	148,912
Accumulated Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	267,400	210,511
Fair value of plan assets	$ 190,084	$ 148,912

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details

- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details