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. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Numerator:
Net income	$ 17,511	$ 17,745	$ 29,414	$ 35,125
Undistributed earnings allocated to participating securities	(19)	(65)	(53)	(154)
Net income attributable to the Company's common shareholders	$ 17,492	$ 17,680	$ 29,361	$ 34,971
Denominator:
Basic weighted-average shares outstanding	56,654	56,481	56,593	56,424
Dilutive securities	255	243	238	233
Diluted weighted-average shares outstanding	56,909	56,724	56,831	56,657
Basic	$ 0.31	$ 0.31	$ 0.52	$ 0.62
Diluted	$ 0.31	$ 0.31	$ 0.52	$ 0.62