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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, 2025	Apr. 30, 2025	Jan. 31, 2025	Jul. 31, 2024	Apr. 30, 2024	Jan. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Per Share Calculation
Net income	$ 16,615	$ 19,726	$ 28,191	$ 72,919	$ 50,836	$ 23,904	$ 64,532	$ 147,659
Less: preferred stock dividends	(2,669)			(2,669)			(8,007)	(8,007)
Less: undistributed earnings allocated to participating securities	(233)			(1,548)			(1,428)	(4,660)
Numerator for basic earnings per share	13,713			68,702			55,097	134,992
Plus: undistributed earnings allocated to participating securities	233			1,548			1,428	4,660
Less: undistributed earnings reallocated to participating securities	(234)			(1,556)			(1,435)	(4,698)
Numerator for diluted earnings per share	$ 13,712			$ 68,694			$ 55,090	$ 134,954
Denominator for basic earnings per share – weighted average shares outstanding (in shares)	6,399			6,474			6,442	6,476
Stock-based payments (in shares)	488			574			494	572
Denominator for diluted earnings per share – weighted-average shares outstanding (in shares)	6,887			7,048			6,936	7,048
Basic earnings per share (in dollars per share)	$ 2.14			$ 10.61			$ 8.55	$ 20.85
Diluted earnings per share (in dollars per share)	$ 1.99			$ 9.75			$ 7.94	$ 19.15

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