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Business Combination - Summary of Results of Operation as Reported and Proforma Basis (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 28, 2020
Dec. 28, 2019
Sep. 28, 2019
Jun. 29, 2019
Mar. 30, 2019
Dec. 29, 2018
Sep. 29, 2018
Jun. 30, 2018
Mar. 28, 2020
Mar. 30, 2019
Mar. 31, 2018
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net [Abstract]                      
Net sales, Reported $ 301,145 $ 342,239 $ 354,458 $ 371,888 $ 327,675 $ 354,671 $ 355,436 $ 322,261 $ 1,369,730 $ 1,360,043 $ 1,064,722
Net (loss) income, Reported                   (58,208) 15,800
Net sales, Proforma                   1,405,847 1,297,159
Net (loss) income, Proforma                   $ (43,460) $ 25,655