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EARNINGS PER SHARE - Reconciliation of Shares Used to Calculate Basic and Diluted Earnings Per Share (Detail) - shares	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Class A Common Stock
Class of Stock [Line Items]
Basic shares (shares)	25,941,279	25,834,636	25,907,423	25,815,533
Assumed conversion of restricted shares (shares)	0	658	0	3,284
Diluted shares (shares)	25,941,279	25,835,294	25,907,423	25,818,817
Class B Common Stock
Class of Stock [Line Items]
Basic shares (shares)	22,000,000	22,000,000	22,000,000	22,000,000
Diluted shares (shares)	22,000,000	22,000,000	22,000,000	22,000,000
Basic and diluted shares (shares)	22,007,725	22,009,596	22,007,725	22,009,682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

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-Publisher FASB
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-Topic 260
-SubTopic 10
-Section 50
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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 260
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