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SEGMENT INFORMATION (Operating information by segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Net revenue:
Revenues	$ 115,908	$ 221,772	$ 273,116	$ 435,463
Income from operations:
Income from operations	(2,465)	38,436	12,090	77,595
Capital Equipment [Member]
Net revenue:
Revenues	80,567	177,132	196,505	348,735
Income from operations:
Income from operations	(9,244)	28,863	(4,114)	58,844
Aftermarket Products and Services (APS) [Member]
Net revenue:
Revenues	35,341	44,640	76,611	86,728
Income from operations:
Income from operations	$ 6,779	$ 9,573	$ 16,204	$ 18,751

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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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