Restructuring Reserve And Plant Closures (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Restructuring Cost and Reserve [Line Items]
Sales price of furniture manufacturing facility			$ 13,629,000	$ 285,000
Gain on sale of furniture manufacturing facility			9,746,000	(2,460,000)
Income tax expense	17,372,000	14,398,000	27,817,000	19,962,000
Office Furniture [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost			4,900,000
Additional restructuring and transition costs during the remainder of 2014			5,800,000
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Sales price of furniture manufacturing facility			12,000,000
Gain on sale of furniture manufacturing facility			5,700,000
Income tax expense			2,700,000
Facility Closing [Member] | Machinery and Equipment [Member] | Cost of Sales [Member] | Office Furniture [Member]
Restructuring Cost and Reserve [Line Items]
Accelerated depreciation			2,400,000
Transaction Costs [Member] | Office Furniture [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost			1,500,000
Severance and Facility Exit Costs [Member] | Office Furniture [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost			$ 1,000,000