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Acquisitions and Divestitures (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 29, 2016	Dec. 29, 2018	Sep. 29, 2018	Dec. 30, 2017
Business Acquisition [Line Items]
Goodwill	$ 290,699		$ 270,788		$ 279,505
Loss on disposition of business	23,000
Notes receivable	$ 10,000
Small Hearth Products Company
Business Acquisition [Line Items]
Goodwill				$ 3,400
OFM
Business Acquisition [Line Items]
Acquisition cost		$ 34,100
Goodwill		14,000
Annual sales		30,000
Intangible assets other than goodwill		$ 15,000
Minimum \| OFM
Business Acquisition [Line Items]
Finite-lived intangible asset useful life		3 years
Maximum \| OFM
Business Acquisition [Line Items]
Finite-lived intangible asset useful life		10 years