Significant Portions of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 30, 2016	Jan. 01, 2016
Deferred tax assets:
Accrued liabilities and allowances	$ 18,335	$ 17,780
Deferred compensation	30,603	27,425
Other	97	43
Total deferred tax assets	49,035	45,248
Deferred tax liabilities:
State taxes	(1,958)	(1,850)
Deductible goodwill	(3,075)	(3,014)
Property, equipment and leasehold improvements	(195)	(205)
Unrealized gain of deferred compensation plan assets	(1,641)	(723)
Total deferred tax liabilities	(6,869)	(5,792)
Net deferred tax assets	$ 42,166	$ 39,456