Leases - Undiscounted Cash Flows for the Finance and Operating Leases (Detail) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Operating Leased Assets [Line Items]
2019 Remainder	$ 34,217
2020	39,481
2021	25,066
2022	15,902
2023	8,875
Total future minimum lease payments	123,541
Less amount representing interest (2.1% to 4.4%)	7,111
Present value of minimum lease payments	116,430
Current maturities of long-term debt	41,184	$ 43,561
Long-term debt, excluding current maturities	75,246	$ 84,864
2019 Remainder	215
2020	137
2021	119
2022	118
2023	41
Total future minimum lease payments	630
Less amount representing interest (2.1% to 4.4%)	41
Present value of minimum lease payments	589
Other current liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, current	248
Deferred income taxes and other noncurrent liabilities [Member]
Operating Leased Assets [Line Items]
Operating lease, liability, non-current	$ 341