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Contracts-In-Process And Long-Term Receivables (Contracts-In-Process) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts-in-Process	$ 159,261	$ 186,896
U.S. Government Contracts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amounts billed	34	265
Unbilled Receivables	1,311	1,634
Contracts-in-Process	1,345	1,899
Commercial Contracts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amounts billed	107,886	125,328
Unbilled Receivables	50,030	59,669
Contracts-in-Process	$ 157,916	$ 184,997

Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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