Business Combination - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	4 Months Ended	9 Months Ended		12 Months Ended
	Aug. 02, 2019	Aug. 02, 2019	Aug. 03, 2018	Oct. 31, 2018
Business Acquisition [Line Items]
Weighted-Average Useful Life		15 years	14 years 3 months 18 days	14 years 3 months 18 days
Gross Carrying Amount	$ 285,593	$ 285,593	$ 149,103	$ 148,865
Accumulated Amortization	(86,581)	(86,581)	(72,048)	(73,797)
Net	199,012	199,012	77,055	75,068
Total other intangible assets, gross	406,467	406,467	179,748	179,446
Total other intangible assets, net	$ 319,886	319,886	$ 107,700	$ 105,649
The Charles Machine Works, Inc.
Business Acquisition [Line Items]
Weighted-Average Useful Life	15 years 10 months 24 days
Gross Carrying Amount	$ 136,880	136,880
Accumulated Amortization	(7,719)	(7,719)
Net	129,161	129,161
Total other intangible assets, gross	227,280	227,280
Total other intangible assets, net	$ 219,561	219,561
Customer-related | The Charles Machine Works, Inc.
Business Acquisition [Line Items]
Weighted-Average Useful Life	18 years 2 months 12 days
Gross Carrying Amount	$ 105,700	105,700
Accumulated Amortization	(2,180)	(2,180)
Net	103,520	$ 103,520
Developed technology
Business Acquisition [Line Items]
Weighted-Average Useful Life		7 years 7 months 6 days	7 years 7 months 6 days	7 years 7 months 6 days
Gross Carrying Amount	50,279	$ 50,279	$ 31,097	$ 31,029
Accumulated Amortization	(30,203)	(30,203)	(28,165)	(28,471)
Net	$ 20,076	20,076	$ 2,932	$ 2,558
Developed technology | The Charles Machine Works, Inc.
Business Acquisition [Line Items]
Weighted-Average Useful Life	7 years 8 months 12 days
Gross Carrying Amount	$ 19,300	19,300
Accumulated Amortization	(1,064)	(1,064)
Net	18,236	$ 18,236
Trade names
Business Acquisition [Line Items]
Weighted-Average Useful Life		15 years 6 months	5 years	5 years
Gross Carrying Amount	7,590	$ 7,590	$ 2,331	$ 2,307
Accumulated Amortization	(2,004)	(2,004)	(1,760)	(1,805)
Net	$ 5,586	5,586	$ 571	$ 502
Trade names | The Charles Machine Works, Inc.
Business Acquisition [Line Items]
Weighted-Average Useful Life	20 years
Gross Carrying Amount	$ 5,300	5,300
Accumulated Amortization	(88)	(88)
Net	$ 5,212	5,212
Backlog | The Charles Machine Works, Inc.
Business Acquisition [Line Items]
Weighted-Average Useful Life	6 months
Gross Carrying Amount	$ 6,580	6,580
Accumulated Amortization	(4,387)	(4,387)
Net	2,193	2,193
Trade names | The Charles Machine Works, Inc.
Business Acquisition [Line Items]
Non-amortizable - trade names	$ 90,400	$ 90,400