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Pension Plans And Other Post Retirement Benefits (Components Of Net Pension Expense For CDT Pension Plan) (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Jun. 30, 2012
Dec. 31, 2012
CDT Pension Plan [Member]
Dec. 31, 2011
CDT Pension Plan [Member]
Dec. 31, 2012
CDT Pension Plan [Member]
Dec. 31, 2011
CDT Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]              
Service cost $ 230   $ 326 $ 117 $ 81 $ 230 $ 166
Interest cost 446   873 226 217 446 444
Amortization of actuarial gains and losses       71 0 139 0
Net pension expense $ 470 $ 306   $ 414 $ 298 $ 815 $ 610