Earnings Per Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Numerator:
Net income (loss)	$ 17,745	$ (77,025)	$ 35,125	$ (77,878)
Undistributed earnings allocated to participating securities	(65)		(154)
Net income (loss) attributable to the Company's common shareholders	$ 17,680	$ (77,025)	$ 34,971	$ (77,878)
Denominator:
Basic weighted average shares outstanding	56,481	54,105	56,424	50,747
Dilutive securities	243		233
Diluted weighted average shares outstanding	56,724	54,105	56,657	50,747
Basic net income (loss) per share	$ 0.31	$ (1.42)	$ 0.62	$ (1.53)
Diluted net income (loss) per share	$ 0.31	$ (1.42)	$ 0.62	$ (1.53)