Leases - Summary of Balances Related to Lease Portfolio within Condensed Consolidated Statement of Operations (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 29, 2019		Sep. 30, 2018	Sep. 29, 2019		Sep. 30, 2018
Cost of Sales [Member]
Lessee Disclosure [Line Items]
Depreciation expense from capital leases	$ 353	[1]	$ 300	$ 1,060	[1]	$ 1,000
Selling, Delivery and Administrative Expenses [Member]
Lessee Disclosure [Line Items]
Depreciation expense from capital leases	1,139	[1]	1,100	3,415	[1]	3,400
Interest Expense, Net [Member]
Lessee Disclosure [Line Items]
Interest expense on capital lease obligations	$ 666	[2]	$ 800	$ 2,083	[2]	$ 2,600

[1] During the third quarter of 2018, the Company had depreciation expense from capital leases of $0.3 million and $1.1 million in cost of sales and SD&A expenses, respectively. During the first nine months of 2018, the Company had depreciation expense from capital leases of $1.0 million and $3.4 million in cost of sales and SD&A expenses, respectively.

[2] The Company had interest expense on capital lease obligations of $0.8 million during the third quarter of 2018 and $2.6 million during the first nine months of 2018.