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Pension Plans And Other Post Retirement Benefits (Anticipated Pension Payments Under CDT Pension Plan) (Details) (CDT Pension Plan [Member], USD $)
In Thousands
Sep. 30, 2011
CDT Pension Plan [Member]
 
Defined Benefit Plan Disclosure [Line Items] 
2012 (nine months ended June 30)$ 467
2013535
2014592
2015650
2016733
2017 to 20214,832
Total$ 7,809