Product Warranties (Details) (USD $)	3 Months Ended		9 Months Ended
	Jan. 26, 2013	Jan. 28, 2012	Jan. 26, 2013	Jan. 28, 2012	Apr. 28, 2012
Product Warranty Contingency [Line Items]
Percentage of warranty liability relating to Upholstery Group (in hundredths)			90.00%
Movement in product warranty [Roll Forward]
Balance as of the beginning of the period	$ 14,313,000	$ 13,818,000	$ 14,327,000	$ 13,854,000
Accruals during the period	4,143,000	3,388,000	11,050,000	10,610,000
Settlements during the period	(3,692,000)	(3,487,000)	(10,613,000)	(10,745,000)
Balance as of the end of the period	14,764,000	13,719,000	14,764,000	13,719,000
Amount of product warranty liability included in accrued expenses and other current liabilities	$ 8,200,000		$ 8,200,000		$ 8,200,000
Fabric and Leather [Member]
Product Warranty Contingency [Line Items]
Warranty term (in years)			1 year
Padding [Member]
Product Warranty Contingency [Line Items]
Warranty term (in years)			1 to 10 years
Certain Mechanisms and Frames [Member]
Product Warranty Contingency [Line Items]
Warranty term (in years)			Up to a lifetime
Labor Costs Relating To Parts [Member]
Product Warranty Contingency [Line Items]
Warranty term (in years)			1 year