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Net Income Per Share - Narrative (Details) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2022
Jul. 31, 2021
Earnings Per Share [Abstract]        
Potentially dilutive shares excluded from the computation of diluted net income per share (in shares) 1,705 7 1,118 417