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Acquisition - Cash Purchase Price (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Business Acquisition [Line Items]
Goodwill	$ 47,772	$ 47,772
Cedar Creek
Business Acquisition [Line Items]
Cash and net working capital assets (excluding inventory)	88,318
Inventory	159,227
Property and equipment	71,203
Other, net	(1,395)
Goodwill	47,772
Finance leases and other liabilities	(44,753)
Cash purchase price	361,752
Customer relationships | Cedar Creek
Business Acquisition [Line Items]
Intangible assets	25,500
Noncompete agreements | Cedar Creek
Business Acquisition [Line Items]
Intangible assets	8,254
Trade names | Cedar Creek
Business Acquisition [Line Items]
Intangible assets	6,826
Favorable leasehold interests | Cedar Creek
Business Acquisition [Line Items]
Intangible assets	$ 800

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