Goodwill and Intangible Assets (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013	Sep. 29, 2013
Finite-lived intangible assets
Gross Amount	$ 128,521,000		$ 128,521,000		$ 208,171,000
Accumulated Amortization	(62,406,000)		(62,406,000)		(121,242,000)
Identifiable intangible assets added on acquisition			2,200,000
Amortization expense for identifiable intangible assets	6,100,000	9,600,000	21,400,000	24,200,000
Estimated amortization expense
2014	5,988,000		5,988,000
2015	19,688,000		19,688,000
2016	15,742,000		15,742,000
2017	13,426,000		13,426,000
2018	6,312,000		6,312,000
Beyond	4,959,000		4,959,000
Total	66,115,000		66,115,000
Noncompete Agreements [Member]
Finite-lived intangible assets
Weighted-Average Remaining Life			2 years 3 months 18 days
Gross Amount	2,150,000		2,150,000		6,160,000
Accumulated Amortization	(1,456,000)		(1,456,000)		(5,247,000)
Customer Relationships [Member]
Finite-lived intangible assets
Weighted-Average Remaining Life			4 years
Gross Amount	121,612,000		121,612,000		128,839,000
Accumulated Amortization	(58,214,000)		(58,214,000)		(49,189,000)
Order or Production Backlog [Member]
Finite-lived intangible assets
Weighted-Average Remaining Life			4 months 24 days
Gross Amount	1,459,000		1,459,000		68,968,000
Accumulated Amortization	(927,000)		(927,000)		(64,675,000)
Technology and Trade Names [Member]
Finite-lived intangible assets
Weighted-Average Remaining Life			2 years 3 months 18 days
Gross Amount	3,300,000		3,300,000		4,204,000
Accumulated Amortization	$ (1,809,000)		$ (1,809,000)		$ (2,131,000)