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Concentration of Credit Risk - Additional Information (Detail)	12 Months Ended
	Dec. 30, 2017 USD ($) Retailer
Concentration Of Credit Risk [Line Items]
Number of independent retailer for unearned advanced amount \| Retailer	1
Reserve established for unearned portion of funds advanced	$ 4,900,000
Percent of unearned advanced amount to total assets	2.00%
Present value of potential obligation for sub-lease	$ 6,400,000
Assigned sublease obligation	13,800,000
Bank debt guaranteed	1,500,000
Payments required under guarantee	0
Loss incurred under guarantee	$ 0
Minimum [Member]
Concentration Of Credit Risk [Line Items]
Loan repayable period	5 years
Estimated loss contingency, in excess of amount currently reserved	$ 0
Maximum [Member]
Concentration Of Credit Risk [Line Items]
Loan repayable period	10 years
Estimated loss contingency, in excess of amount currently reserved	$ 25,000,000