Revisions to Applicable Condensed Consolidated Statements of Cash Flows Line Item to Correct the Errors (Detail) - USD ($) $ in Thousands	4 Months Ended
	Apr. 22, 2017	Apr. 23, 2016
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Other assets	$ (4,702)	$ 4,243
Other accrued liabilities	4,052	5,098
Net cash provided by operating activities	75,994	118,745
Repurchase of independent distributor territories	(3,161)	(4,845)
Principal payments from notes receivable	7,370	7,221
Other investing activities	56	66
Net cash disbursed for investing activities	$ 28,359	(19,940)
As Previously Reported
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Other assets		8,591
Other accrued liabilities		2,912
Net cash provided by operating activities		120,707
Repurchase of independent distributor territories		(8,042)
Principal payments from notes receivable		8,322
Net cash disbursed for investing activities		(22,102)
Revisions
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Other assets		(4,348)
Other accrued liabilities		2,186
Net cash provided by operating activities		(1,962)
Repurchase of independent distributor territories		3,197
Principal payments from notes receivable		(1,101)
Other investing activities		66
Net cash disbursed for investing activities		$ 2,162