Commitments and Contingencies Revenue Sharing Agreement with the Commonwealth of Australia (Details)					6 Months Ended
	Jun. 29, 2012 Other Assets [Member] USD ($)	Dec. 31, 2011 Other Assets [Member] USD ($)	Jun. 29, 2012 Foreign Exchange Contract Two [Member] Other Liabilities [Member] USD ($)	Feb. 12, 2009 Foreign Exchange Contract Two [Member] Other Liabilities [Member] AUD	Jun. 29, 2012 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] SH-2G(A) Super Seasprite Program [Member] AUD	Jun. 29, 2012 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] Future Payments for Revenue Sharing Agreement [Member] SH-2G(A) Super Seasprite Program [Member] AUD	Jun. 29, 2012 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] Future Payments for Revenue Sharing Agreement [Member] SH-2G(A) Super Seasprite Program [Member] USD ($)	Jun. 29, 2012 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] Foreign Exchange Contract Two [Member] Other Assets [Member] Not Designated as Hedging Instrument [Member] USD ($)	Jun. 29, 2012 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] Foreign Exchange Contract Two [Member] Other Assets [Member] Not Designated as Hedging Instrument [Member] AUD	Jun. 29, 2012 Letter of Credit [Member] Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] SH-2G(A) Super Seasprite Program [Member] USD ($)
Loss Contingencies [Line Items]
Contractual obligation			$ 3,500,000	39,500,000
Cumultive payments, contractual obligation					33,100,000
Contractual Obligation, Due in Next Twelve Months						6,400,000	6,600,000
Contractual Obligation, Expected, Year Two						39,500,000
Letters of Credit Outstanding, Amount										6,600,000
Derivative instruments	$ 1,289,000	$ 3,518,000						$ 2,200,000	3,400,000