Commitments and Contingencies (Details) (USD $)	1 Months Ended	3 Months Ended
	Jan. 31, 2012	Dec. 30, 2011	Sep. 30, 2011	Apr. 01, 2011
Commitment and Contingencies (Textual) [Abstract]
Indemnification liability		$ 20,500,000	$ 500,000	$ 500,000
Amount recorded under indemnification agreement		20,000,000
Indemnification receivable		20,000,000		0
Payment received under indemnification agreement	20,000,000
Payment made under indemnification agreement	20,500,000
Total US government contract-related reserves balance		$ 6,700,000		$ 6,700,000