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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 6 Months Ended
Apr. 30, 2025
Jan. 31, 2025
Apr. 30, 2024
Jan. 31, 2024
Apr. 30, 2025
Apr. 30, 2024
Per Share Calculation            
Net income $ 19,726 $ 28,191 $ 50,836 $ 23,904 $ 47,917 $ 74,740
Less: preferred stock dividends (2,669)   (2,669)   (5,338) (5,338)
Less: undistributed earnings allocated to participating securities (144)   (2,193)   (350) (3,214)
Numerator for basic earnings per share 16,913   45,974   42,229 66,188
Plus: undistributed earnings allocated to participating securities 144   2,193   350 3,215
Less: undistributed earnings reallocated to participating securities (144)   (2,194)   (351) (3,215)
Numerator for diluted earnings per share $ 16,913   $ 45,973   $ 42,228 $ 66,188
Denominator for basic earnings per share – weighted average shares outstanding (in shares) 6,411   6,457   6,464 6,477
Stock-based payments (in shares) 540   445   547 443
Denominator for diluted earnings per share – weighted-average shares outstanding (in shares) 6,951   6,902   7,011 6,920
Basic earnings per share (in dollars per share) $ 2.64   $ 7.12   $ 6.53 $ 10.22
Diluted earnings per share (in dollars per share) $ 2.43   $ 6.66   $ 6.02 $ 9.57