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Business Combination - Summary of Results of Operation as Reported and Proforma Basis (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 28, 2019
Dec. 29, 2018
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net [Abstract]        
Net sale, Reported $ 342,239 $ 354,671 $ 1,068,585 $ 1,032,368
Net loss, Reported       (67,365)
Net sale, Proforma       1,078,172
Net loss, Proforma       $ (52,256)