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Revolving Line of Credit - Additional Information (Detail)
6 Months Ended
Jul. 01, 2017
USD ($)
Debt Instrument [Line Items]  
Credit facility, borrowing outstanding $ 0
Revolving Credit Facility  
Debt Instrument [Line Items]  
Line of credit, current borrowing capacity $ 150,000,000
Line of credit, expiration date Mar. 31, 2019