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Reportable Segments - Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 02, 2017	Jun. 26, 2016	Jul. 02, 2017	Jun. 26, 2016	Oct. 02, 2016
Financial information regarding reportable segments
Gain (loss) on change in contingent consideration			$ 7,149	$ (2,823)
Acquisition and integration expense		$ 1,005		16,916
Revenue	$ 685,539	666,869	2,018,171	1,854,961
Operating Income (Loss)	45,884	39,085	128,695	88,667
Depreciation	5,345	5,912	16,360	17,183
Total Assets	1,819,724		1,819,724		$ 1,800,779
Inter-segment elimination
Financial information regarding reportable segments
Revenue	(15,726)	(17,934)	(62,269)	(47,478)
Corporate
Financial information regarding reportable segments
Gain (loss) on change in contingent consideration			7,100	(2,800)
Acquisition and integration expense		1,000		16,900
Operating Income (Loss)	(8,994)	(8,980)	(18,278)	(43,071)
Depreciation	247	393	800	1,211
Total Assets	927,781		927,781		930,339
WEI | Operating segment
Financial information regarding reportable segments
Revenue	279,621	264,729	835,687	731,120
Operating Income (Loss)	28,821	25,206	76,084	61,627
Depreciation	1,151	1,223	3,515	3,594
Total Assets	315,189		315,189		308,438
RME | Operating segment
Financial information regarding reportable segments
Revenue	417,452	414,872	1,232,352	1,134,538
Operating Income (Loss)	27,308	26,882	83,648	79,802
Depreciation	3,823	4,113	11,270	11,818
Total Assets	541,885		541,885		522,895
RCM | Operating segment
Financial information regarding reportable segments
Revenue	4,192	5,202	12,401	36,781
Operating Income (Loss)	(1,251)	(4,023)	(12,759)	(9,691)
Depreciation	124	$ 183	775	$ 560
Total Assets	$ 34,869		$ 34,869		$ 39,107

X

- Definition

This element represents acquisition and integration -related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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- Definition

The amount of fair value adjustments to contingent consideration during the reporting period.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 360
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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