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Summary of Significant Accounting Policies - Customer Loyalty Program (Details) - Customer Loyalty Program - USD ($)
$ in Thousands
 9 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Customer Loyalty Program    
Number of days in which customers must make a qualifying purchase in order to maintain an active point balance 365 days  
Number of days from award grant date in which the customer has to make a qualifying purchase to redeem the awards 60 days  
Reserve for Returns $ 2,551 $ 2,144
Reconciliation of Activity in Program    
Beginning balance 1,936 1,705
Year-to-date provisions 5,410 4,237
Year-to-date award redemptions (4,795) (3,798)
Ending balance $ 2,551 $ 2,144