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Reconciliation of Total Amounts of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Income Tax Disclosure [Abstract]      
Unrecognized tax benefit at beginning of fiscal year $ 1,754 $ 727 $ 2,107
Gross increases   1,488  
Lapses of statutes of limitations (495) (461) (1,380)
Unrecognized tax benefit at end of fiscal year $ 1,259 $ 1,754 $ 727