Pension And Other Postretirement Benefits (Schedule Of Reconciliation Of Changes In Level 3 Pension Assets Measured At Fair Value On Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Hedge Fund Of Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of year	$ 20,689
Unrealized gains (losses)	(65)
Balance at end of year	20,624
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance at beginning of year	498
Unrealized gains (losses)	25
Foreign currency adjustment	8
Balance at end of year	$ 531