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Benefit Plans (Tables)
9 Months Ended
Oct. 31, 2020
Retirement Benefits [Abstract]  
Schedule of components of net periodic benefit costs
The components of net periodic benefit costs are as follows (in thousands): 
 Three Months EndedNine Months Ended
 October 31,
2020
November 2,
2019
October 31,
2020
November 2,
2019
Components of net periodic benefit costs:    
Service cost$1,090 $906 $3,270 $2,716 
Interest cost1,536 1,916 4,608 5,750 
Net actuarial loss568 — 1,705 — 
Net periodic benefit costs$3,194 $2,822 $9,583 $8,466 
The service cost component of net periodic benefit costs is included in selling, general and administrative expenses, and the interest cost and net actuarial loss components are included in other expense.