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Long-Term Debt - Contractual Future Maturities of Long-Term Debt Outstanding, Including Other Debt Relating to Software License Financing Arrangement (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 30, 2017
Debt Disclosure [Abstract]    
Remainder of 2018 $ 148  
2019 164  
2020 0  
2021 0  
2022 223,975  
Total $ 224,287 $ 224,000