Note 13 - Per Share Calculation - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Jul. 31, 2024	Apr. 30, 2024	Jan. 31, 2024	Jul. 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Per Share Calculation
Net income	$ 72,919	$ 50,836	$ 23,904	$ 55,764	$ 34,146	$ 18,716	$ 147,659	$ 108,626
Less: preferred stock dividends	(2,669)			(2,669)			(8,007)	(8,007)
Less: undistributed earnings allocated to participating securities	(1,548)			(3,578)			(4,660)	(7,780)
Numerator for basic earnings per share	68,702			49,517			134,992	92,839
Plus: undistributed earnings allocated to participating securities	1,548			3,578			4,660	7,780
Less: undistributed earnings reallocated to participating securities	(1,556)			(3,582)			(4,698)	(7,801)
Numerator for diluted earnings per share	$ 68,694			$ 49,513			$ 134,954	$ 92,818
Denominator for basic earnings per share – weighted average shares outstanding (in shares)	6,474			6,249			6,476	6,201
Stock-based payments (in shares)	574			456			572	441
Denominator for diluted earnings per share – weighted-average shares outstanding (in shares)	7,048			6,705			7,048	6,642
Basic earnings per share ( in dollor per share	$ 10.61			$ 7.92			$ 20.85	$ 14.97
Diluted earnings per share (in dollars per share)	$ 9.75			$ 7.38			$ 19.15	$ 13.97

Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash.

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Amount of undistributed earnings (loss) allocated to participating securities for the diluted earnings (loss) per share or per unit calculation under the two-class method.

+ References

Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
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-Section 45
-Paragraph 65
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
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-Section 45
-Paragraph 60B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
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-Name Accounting Standards Codification
-Section 45
-Paragraph 16
-Publisher FASB
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- Definition

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://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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