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Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Income Tax Disclosure [Abstract]
Balance, beginning	$ 1,837	$ 1,954	$ 2,115
Additions for tax positions of current year	425	224	209
Additions for tax positions of prior years	115	42
Changes in prior year tax positions	(64)	(10)	(33)
Lapses of applicable statute of limitations	(349)	(373)	(337)
Balance, ending	$ 1,964	$ 1,837	$ 1,954

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Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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