Schedule of Changes in Issued and Outstanding Common Shares and Treasury Stock (Detail) - shares	6 Months Ended		11 Months Ended	21 Months Ended
	Apr. 01, 2016	Mar. 27, 2015	Oct. 02, 2015	Apr. 01, 2016
Equity [Abstract]
Balance, beginning of year	32,378,185		32,123,717
Shares issued under share-based compensation plans	103,629		254,468
Balance, end of current period	32,481,814		32,378,185	32,481,814
Balance, beginning of year	(2,831,350)		(269,228)
Shares purchased	(202,310)	(1,167,732)	(2,562,122)	(3,033,660)
Balance, end of current period	(3,033,660)		(2,831,350)	(3,033,660)
Shares outstanding, end of period	29,448,154		29,546,835	29,448,154