Acquisitions and Divestitures (Details) - USD ($) $ in Thousands				12 Months Ended
	Dec. 31, 2016	Jan. 29, 2016	Oct. 01, 2014	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Business Acquisition [Line Items]
Goodwill	$ 290,699			$ 290,699	$ 277,650	$ 279,310
Goodwill increase associated with acquisition				2,000
Office Furniture
Business Acquisition [Line Items]
Goodwill	107,643			107,643	$ 94,594	$ 97,552
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax charge related to sale of business	23,000
Long term note receivable	$ 10,000			$ 10,000
OFM
Business Acquisition [Line Items]
Annual sales of company acquired		$ 30,000
Acquisition cost		34,100
Intangible assets		15,000
Goodwill		$ 14,000
OFM | Minimum
Business Acquisition [Line Items]
Useful life		3 years
OFM | Maximum
Business Acquisition [Line Items]
Useful life		10 years
Vermont Castings Group
Business Acquisition [Line Items]
Goodwill			$ 17,000
Cash paid for acquisition			62,200
Purchase price allocation on intangible assets, other than goodwill			$ 24,900
Vermont Castings Group | Minimum
Business Acquisition [Line Items]
Useful life			5 years
Vermont Castings Group | Maximum
Business Acquisition [Line Items]
Useful life			15 years