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Commitments and Contingencies - Additional Information (Detail) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2019 | Oct. 31, 2018
Loss Contingencies [Line Items] |  |
Contingent liability under purchase agreements for future chassis inventory purchases | $ 53,300,000 | $ 54,500,000
Repurchase agreement | 2 years |
Represents the gross value of all vehicles under repurchase agreements | $ 243,600,000 | 310,500,000
Maximum [Member] |  |
Loss Contingencies [Line Items] |  |
Estimated loss exposure under contract | $ 26,800,000 | $ 25,200,000

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- Definition Amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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