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Exit Activity Costs And Asset Impairments (Schedule Of Asset Impairment Charges Related To Restructuring Activities) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Restructuring and Related Cost [Line Items]
Activity costs related to moving and severance costs related to facilities	$ 1,642,000	$ 4,299,000
Facility Closing [Member]
Restructuring and Related Cost [Line Items]
Asset impairment charges related to sales of facility	$ 2,200,000

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

Amount expected to be charged against earnings in the current and future periods for the specified restructuring cost.