Acquisitions - Additional Information (Detail) - USD ($) $ in Millions		1 Months Ended	3 Months Ended			12 Months Ended
	Jan. 12, 2018	Feb. 01, 2020	Oct. 31, 2020	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Business Acquisition [Line Items]
Cash acquired from acquisition			$ 7.5
Payments to acquire business, net of cash acquired						$ 47.3		$ 60.0
Goodwill			$ 157.3			157.3	$ 159.8	$ 161.8
Business combination bargain purchase gain recognized decrease amount						3,300.0
Gain on acquisition of business						8.6
Net increase in goodwill							(2.0)
Lance Camper Mfg. Corp. [Member]
Business Acquisition [Line Items]
Percentage of voting interest acquired	100.00%
Business acquisition, purchase price paid	$ 67.3
Cash acquired from acquisition	6.0
Payments to acquire business, net of cash acquired	61.3
Deferred purchase price payable							5.0
Deferred purchase price paid				$ 5.0	$ 5.0
Goodwill	25.5
Business acquisition, purchase price	67.3
Lance Camper Mfg. Corp. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Contingent consideration liability	$ 10.0
Spartan Emergency Response [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price paid		$ 54.8
Business acquisition, purchase price		54.8
Gain on acquisition of business		$ 8.6				8.6	$ 11.9
Net sales						212.4
Operating income						10.0
Spartan Emergency Response [Member] | Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Acquisition related costs						$ 1.6