Note 13 - Per Share Calculation - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Net income	$ 225,490	$ 607,817	$ 50,928
Less: preferred stock dividends	(10,675)	0	0
Less: undistributed earnings allocated to participating securities	(19,702)	(57,676)	(4,652)
Numerator for basic earnings per share	195,113	550,141	46,276
Plus: undistributed earnings allocated to participating securities	19,702	57,676	4,652
Less: undistributed earnings reallocated to participating securities	(19,717)	(58,687)	(4,652)
Numerator for diluted earnings per share	$ 195,098	$ 549,130	$ 46,276
Denominator for basic earnings per share – weighted average shares outstanding (in shares)	6,437	6,287	6,189
Stock-based payments (in shares)	291	108	395
Denominator for diluted earnings per share – weighted-average shares outstanding (in shares)	6,728	6,395	6,584
Basic earnings per share (in dollars per share)	$ 30.31	$ 87.50	$ 7.48
Diluted earnings per share (in dollars per share)	$ 29.00	$ 85.86	$ 7.03