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Business Combinations - Mattress Fabric Segment - Narrative (Detail)	12 Months Ended
	May 01, 2016
Non-compete Agreement [Member]
Business Acquisition [Line Items]
Intangible asset, useful life	15 years
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible asset, useful life	17 years
Bodet And Horst [Member] | Equipment [Member]
Business Acquisition [Line Items]
Tangible asset, useful life	7 years
Bodet And Horst [Member] | Non-compete Agreement [Member]
Business Acquisition [Line Items]
Intangible asset, useful life	15 years
Bodet And Horst [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible asset, useful life	17 years

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