Long Term Debt - Schedule of Long-term Debt (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Term note payable in quarterly installments		$ 2,000
Lump sum payment due	$ 224,433	264,000
Term Loan Payable with 0.675 [Member]
Debt Instrument [Line Items]
Term note payable in quarterly installments	$ 675	$ 675
Average rate of interest payable	1.46%	1.00%
Average rate margin of interest payable	4.75%	5.75%
Term Loan Payable with 0.675 [Member] | Due on February 15, 2022 [Member]
Debt Instrument [Line Items]
Lump sum payment due	$ 253,800	$ 253,800