Reportable Segments - Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended
Jan. 01, 2017	Dec. 27, 2015	Oct. 02, 2016
Financial information concerning reportable segments
Revenue	$ 668,851	$ 560,708
Operating Income	39,855	32,930
Depreciation	5,251	5,303
Total assets	1,800,423		$ 1,800,779
Inter-segment elimination
Financial information concerning reportable segments
Revenue	(22,538)	(16,218)
Corporate
Financial information concerning reportable segments
Operating Income	(8,815)	(7,261)
Depreciation	284	409
Total assets	895,212		930,339
WEI \| Operating segment
Financial information concerning reportable segments
Revenue	287,136	240,383
Operating Income	24,979	20,030
Depreciation	1,165	1,168
Total assets	331,947		308,438
RME \| Operating segment
Financial information concerning reportable segments
Revenue	396,022	315,717
Operating Income	26,733	25,443
Depreciation	3,647	3,533
Total assets	534,306		522,895
RCM \| Operating segment
Financial information concerning reportable segments
Revenue	8,231	20,826
Operating Income	(3,042)	(5,282)
Depreciation	155	$ 193
Total assets	$ 38,958		$ 39,107

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.18)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 12
-Article 7

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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=56944662&loc=d3e3602-108585

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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))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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