Business Acquisitions and Investments - Additional Information (Detail) - USD ($)				12 Months Ended
	Aug. 31, 2018	Oct. 26, 2017	Jan. 06, 2017	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Jan. 27, 2017
Business Acquisition [Line Items]
Business acquisition, goodwill				$ 74,458,000	$ 72,606,000	$ 65,999,000
Business acquisition, measurement period adjustments, increase to goodwill				1,852,000	(193,000)
Equity Method Supplier [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage							33.00%
Equity method investment, cost							$ 10,000,000.0
Minimum [Member]
Business Acquisition [Line Items]
Cash flows discounted at rates		15.00%
Maximum [Member]
Business Acquisition [Line Items]
Cash flows discounted at rates		17.00%
Flight Systems Automotive Group LLC [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of outstanding stock acquired	100.00%
Business acquisition, cash paid	$ 27,500,000
Business acquisition, goodwill	7,400,000
Business acquisition, identified intangibles	4,100,000
Business acquisition, other net assets	16,000,000.0
Business acquisition, accounts receivables	2,000,000.0
Business acquisition, inventory	8,400,000
Business acquisition, fixed assets	4,400,000
Business acquisition, other assets and liabilities net	$ 1,200,000
Business acquisition, measurement period adjustments, increase to goodwill				1,900,000
Business acquisition, measurement period adjustments, decrease to inventory				700,000
Business acquisition, measurement period adjustments, decrease to identified intangibles				1,200,000
MAS Automotive Distribution Inc [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of outstanding stock acquired		100.00%
Business acquisition, goodwill		$ 35,431,000
Business acquisition, identified intangibles		20,440,000
Business acquisition, fixed assets		1,615,000
Business acquisition, total purchase price consideration		67,223,000
Business acquisition, cash acquired		3,300,000
Net sales, included in consolidated statement of operations				40,300,000
Estimated contingent payments		7,982,000		5,600,000
Business combination maximum contingent consideration payment		$ 11,700,000
Business combination sales thresholds achievement maturity date		2020-12
Payment to former shareholder					1,500,000
Reduction in accrual				(2,300,000)	(7,900,000)
MAS Automotive Distribution Inc [Member] | Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Estimated contingent payments				300,000
Reduction in accrual				$ (2,600,000)
Ingalls Engineering Company, Inc., [Member]
Business Acquisition [Line Items]
Business acquisition, cash paid			$ 3,100,000
Business acquisition, other net assets			2,000,000.0
Business acquisition, total purchase price consideration			$ 4,800,000
Business acquisition date			Jan. 06, 2017
Business acquisition, estimated contingent payments			$ 1,700,000
Business acquisition of goodwill and other intangible assets			$ 2,800,000
Ingalls Engineering Company, Inc., [Member] | Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Reduction in accrual					$ (2,100,000)