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Segment Information - Capital Expenditures and Depreciation Expense By Operating Segments (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Jan. 26, 2014
Jan. 27, 2013
Segment Reporting Information [Line Items]    
Capital expenditures $ 2,667 [1] $ 2,594 [1]
Depreciation expense 3,964 3,818
Operating Segments [Member] | Mattress Fabrics [Member]
   
Segment Reporting Information [Line Items]    
Capital expenditures 1,936 2,223
Depreciation expense 3,510 3,344
Operating Segments [Member] | Upholstery Fabrics [Member]
   
Segment Reporting Information [Line Items]    
Capital expenditures 694 222
Depreciation expense 454 474
Unallocated corporate [Member]
   
Segment Reporting Information [Line Items]    
Capital expenditures $ 37 $ 149
[1] Capital expenditure amounts are stated on the accrual basis. See Consolidated Statement of Cash Flows for capital expenditure amounts on a cash basis.