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Acquisitions - Pro Forma Results of Operations (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Revenues $ 429,531 $ 369,271 $ 354,484
Net income $ 85,549 $ 48,788 $ 30,933
EARNINGS PER SHARE (Note 16)      
Basic (in dollars per share) $ 1.01 $ 0.58 $ 0.38
Diluted (in dollars per share) $ 0.99 $ 0.57 $ 0.37