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Business Combination and Acquisitions - Summary of Results of Operation as Reported and Proforma Basis (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 30, 2019
Dec. 29, 2018
Sep. 29, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 30, 2017
Sep. 30, 2017
Jul. 01, 2017
Mar. 30, 2019
Mar. 31, 2018
Apr. 01, 2017
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net [Abstract]                      
Net sale, Reported $ 327,675 $ 354,671 $ 355,436 $ 322,261 $ 266,278 $ 294,378 $ 259,963 $ 244,103 $ 1,360,043 $ 1,064,722 $ 861,319
Net (loss) income, Reported                 (58,208) 15,800  
Net sale, Proforma                 1,405,847 1,297,159  
Net (loss) income, Proforma                 $ (43,460) $ 25,655