Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 01, 2011	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 290,136	$ 290,473	$ 291,001
Accumulated impairment losses, beginning balance		(29,502)	(29,359)	(22,609)
Goodwill, beginning balance		260,634	261,114	268,392
Goodwill acquired during the year		10,127	0	0
Impairment losses		0	(143)	(6,750)
Goodwill related to the sale of business units		0	(486)	(1,028)
Final purchase price allocations/contingent payments from prior year acquisitions		0	149	500
Goodwill, ending balance	290,136	300,263	290,136	290,473
Accumulated impairment losses, ending balance	(29,502)	(29,502)	(29,502)	(29,359)
Goodwill, ending balance	260,634	270,761	260,634	261,114
Office Furniture [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		123,948	123,948	123,948
Accumulated impairment losses, beginning balance		(29,359)	(29,359)	(22,609)
Goodwill, beginning balance		94,589	94,589	101,339
Goodwill acquired during the year		10,127	0	0
Impairment losses	2,000	0	0	(6,750)
Goodwill related to the sale of business units		0	0	0
Final purchase price allocations/contingent payments from prior year acquisitions		0	0	0
Goodwill, ending balance	123,948	134,075	123,948	123,948
Accumulated impairment losses, ending balance	(29,359)	(29,359)	(29,359)	(29,359)
Goodwill, ending balance	94,589	104,716	94,589	94,589
Reporting Unit [Member]
Goodwill [Roll Forward]
Goodwill, ending balance		24,000
Hearth Products [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		166,188	166,525	167,053
Accumulated impairment losses, beginning balance		(143)	0	0
Goodwill, beginning balance		166,045	166,525	167,053
Goodwill acquired during the year		0	0	0
Impairment losses		0	(143)	0
Goodwill related to the sale of business units		0	(486)	(1,028)
Final purchase price allocations/contingent payments from prior year acquisitions		0	149	500
Goodwill, ending balance	166,188	166,188	166,188	166,525
Accumulated impairment losses, ending balance	(143)	(143)	(143)	0
Goodwill, ending balance	$ 166,045	$ 166,045	$ 166,045	$ 166,525