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Pension And Postretirement Benefits (Changes In The Fair Value Of The Pension Plans' Assets) (Details) (USD $)					12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Hedge Funds [Member]	Dec. 31, 2011 Hedge Funds [Member]	Dec. 31, 2011 Significant Unobservable Inputs Level 3 [Member] Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Change in plan assets, Fair value of plan assets at beginning of year	$ 735,580,000	$ 678,250,000	$ 73,430,000	$ 67,967,000	$ 17,169,000
Total Realized and Unrealized Gains/(Losses)					(1,498,000)
Purchases, Sales, Settlements Transfers in or out of Level 3					(15,671,000)
Change in plan assets, Fair value of plan assets at end of year	$ 735,580,000	$ 678,250,000	$ 73,430,000	$ 67,967,000	$ 0

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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