Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Thousands	9 Months Ended
	Oct. 03, 2015 USD ($)
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	$ 331,614
Accumulated impairment losses, beginning balance	(52,304)
Goodwill, net, beginning balance	279,310
Goodwill acquired	1,298
Foreign currency translation adjustments	4
Goodwill, gross, ending balance	332,916
Accumulated impairment losses, ending balance	(52,304)
Goodwill, net, ending balance	280,612
Office Furniture [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	149,713
Accumulated impairment losses, beginning balance	(52,161)
Goodwill, net, beginning balance	97,552
Goodwill acquired	0
Foreign currency translation adjustments	4
Goodwill, gross, ending balance	149,717
Accumulated impairment losses, ending balance	(52,161)
Goodwill, net, ending balance	97,556
Hearth Products [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	181,901
Accumulated impairment losses, beginning balance	(143)
Goodwill, net, beginning balance	181,758
Goodwill acquired	1,298
Foreign currency translation adjustments	0
Goodwill, gross, ending balance	183,199
Accumulated impairment losses, ending balance	(143)
Goodwill, net, ending balance	$ 183,056