Inventories Inventory due to contract changes, negotiated settlements and claims for unanticipated contract costs (Details) (USD $)	9 Months Ended
Sep. 28, 2012	Dec. 31, 2011
6. INVENTORIES [Abstract]
Loss Related to Litigation Settlement	$ 600,000
Inventory due to contract changes, negotiated settlements and claims for unanticipated contract costs	$ 6,326,000	$ 7,432,000

inventory due to contract changes, negotiated settlements and claims for unanticipated contract costs

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant