Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Mar. 30, 2013	Sep. 29, 2012
Business Acquisition [Line Items]
Number of acquisitions completed	2	4
Aspen [Member]
Business Acquisition [Line Items]
Acquisitions of businesses, net of cash acquired	33,911
Space And Defense Segment [Member]
Business Acquisition [Line Items]
Number of acquisitions completed	1	2
Components Segment [Member]
Business Acquisition [Line Items]
Number of acquisitions completed	1	2
Protokraft [Member]
Business Acquisition [Line Items]
Acquisitions of businesses, net of cash acquired		12,500
Business Acquisition, Contingent Consideration, at Fair Value		4,809
Tritech [Member]
Business Acquisition [Line Items]
Acquisitions of businesses, net of cash acquired		34,267
Business Acquisitions, Working Capital Adjustments, Cash Paid		1,346
Bradford Engineering [Member]
Business Acquisition [Line Items]
Acquisitions of businesses, net of cash acquired		13,173
In-Space Propulsion [Member]
Business Acquisition [Line Items]
Acquisitions of businesses, net of cash acquired		45,495