Fair Value - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Dec. 29, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of assets, level 2 to level 3 transfers	$ 0	$ 0	$ 0	$ 0
Principal outstanding value	378,975,000		378,975,000		$ 379,138,000
2016 Credit Agreement [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of current long-term debt	64,100,000		64,100,000		63,200,000
Principal outstanding value	64,000,000.0		64,000,000.0		64,000,000.0
2018 Senior Notes [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of current long-term debt	340,200,000		340,200,000		311,900,000
Principal outstanding value	$ 315,000,000.0		$ 315,000,000.0		$ 315,000,000.0