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SEGMENT INFORMATION (Operating information by segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Net revenue:
Revenues	$ 127,109	$ 268,834	$ 400,225	$ 704,297
Income from operations:
Income from operations	1,827	64,463	13,917	142,058
Capital Equipment [Member]
Net revenue:
Revenues	89,860	229,462	286,364	578,197
Income from operations:
Income from operations	(6,449)	57,771	(10,563)	116,615
Aftermarket Products and Services (APS) [Member]
Net revenue:
Revenues	37,249	39,372	113,861	126,100
Income from operations:
Income from operations	$ 8,276	$ 6,692	$ 24,480	$ 25,443

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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