Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Mar. 26, 2016	Dec. 26, 2015	Dec. 27, 2014	Dec. 26, 2015	Dec. 27, 2014
Multiemployer Plans [Abstract]
Employer contribution for pension plan		$ 40
Multiemployer pension payments		262	$ 1,005	$ 559	$ 1,876
Multi-employer plan withdrawal liability		$ 8,617		$ 8,617
Settlement payment on multiemployer plan	$ 5,425