Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017
Expenses Related to System Transformation Transactions [Member]
Pre-tax income/(expense) impact	$ (10,598)	$ (10,417)	$ (9,871)	$ (12,450)	$ (17,171)	$ (13,148)	$ (11,574)	$ (7,652)
Exchange Transaction [Member]
Pre-tax income/(expense) impact		$ 10,170			529
Expenses Related to Workforce Optimization [Member]
Pre-tax income/(expense) impact	$ (3,745)		$ (4,810)
System Transformation Transactions Settlement Impact [Member]
Pre-tax income/(expense) impact					2,446		$ (9,442)
Portion of Legacy Facilities Credit Related to Mobile, Alabama Facility Impact [Member]
Pre-tax income/(expense) impact					12,364
Acquisition of Southeastern Container Preferred Shares from CCR impact [Member]
Pre-tax income/(expense) impact					6,012
Tax Act Impact [Member]
Post-tax income/(expense) impact					$ 66,595