Pension Plan (Schedule Of Plan Assets Category) (Details)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Pension Plan [Abstract]
Equity securities	45.00%	62.00%
Fixed income securities	50.00%	31.00%
Other	5.00%	7.00%
Total	100.00%	100.00%

Target allocation percentage in other than debt securities, equity securities, and real estate to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

No definition available.

Name:	us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsOther
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration