Product Warranties (Details) (USD $)	3 Months Ended
	Jul. 26, 2014	Jul. 27, 2013	Apr. 26, 2014
Reconciliation of changes in product warranty liability [Roll Forward]
Balance as of the beginning of the period	$ 16,013,000	$ 15,525,000
Accruals during the period	4,317,000	3,789,000
Accrual adjustments	(953,000)
Settlements during the period	(4,121,000)	(3,493,000)
Balance as of the end of the period	15,256,000	15,821,000
Product warranty liability included in accrued expenses and other current liabilities	$ 9,400,000		$ 9,800,000
Upholstery Group [Member]
Product Liability Contingency [Line Items]
Percentage of warranty liability relating to the segment	95.00%
Fabric and Leather [Member]
Product Liability Contingency [Line Items]
Warranty term	1 year
Padding [Member] | Minimum [Member]
Product Liability Contingency [Line Items]
Warranty term	1 year
Padding [Member] | Maximum [Member]
Product Liability Contingency [Line Items]
Warranty term	10 years
Labor Costs Relating To Parts [Member]
Product Liability Contingency [Line Items]
Warranty term	1 year