Business Segment Information (Details) $ in Thousands	3 Months Ended
	Apr. 02, 2016 USD ($) Segment	Apr. 04, 2015 USD ($)	Jan. 02, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	2
Net sales	$ 501,037	$ 523,477
Operating Profit:	17,723	13,520
Depreciation & Amortization Expense:	15,251	13,860
Capital Expenditures (including capitalized software):	27,457	28,223
Identifiable Assets:	1,311,452		$ 1,263,925
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Profit:	33,861	32,653
Operating Segments [Member] | Office Furniture [Member]
Segment Reporting Information [Line Items]
Net sales	387,339	407,429
Operating Profit:	21,300	20,152
Depreciation & Amortization Expense:	10,693	10,377
Capital Expenditures (including capitalized software):	16,468	14,551
Identifiable Assets:	764,741		739,915
Operating Segments [Member] | Hearth Products [Member]
Segment Reporting Information [Line Items]
Net sales	113,698	116,048
Operating Profit:	12,561	12,501
Depreciation & Amortization Expense:	2,656	1,958
Capital Expenditures (including capitalized software):	2,553	2,404
Identifiable Assets:	348,194		341,813
Corporate [Member]
Segment Reporting Information [Line Items]
Operating Profit:	(16,138)	(19,133)
Depreciation & Amortization Expense:	1,902	1,525
Capital Expenditures (including capitalized software):	8,436	$ 11,268
Identifiable Assets:	$ 198,517		$ 182,197