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Stock-Based Compensation - Summary of Stock Awards Activity (Details) - Stock Award Units
$ / shares in Units, $ in Thousands
6 Months Ended
Jul. 31, 2021
USD ($)
$ / shares
shares
Number of Stock Award Units  
Stock Award Units, Beginning Balance | shares 415,994
Units granted | shares 126,497
Units vested | shares (228,928)
Units forfeited | shares 0
Stock Award Units, Ending Balance | shares 313,563
Weighted Average Grant Date Fair Value  
Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares $ 29.17
Units granted, Weighted Average Grant Date Fair Value | $ / shares 27.62
Units vested, Weighted Average Grant Date Fair Value | $ / shares 31.49
Units forfeited, Weighted Average Grant Date Fair Value | $ / shares 0
Weighted Average Grant Date Fair Value Ending Balance | $ / shares $ 26.85
Weighted-Average Remaining Contractual Term (years)  
Units outstanding, Weighted-Average Remaining Contractual Term (years) 2 years 1 month 6 days
Aggregate Intrinsic Value  
Units outstanding, Aggregate Intrinsic Value | $ $ 9,429