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Exit and Disposal Activities - Narrative (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jan. 27, 2019	Jan. 27, 2019
Restructuring Cost and Reserve [Line Items]
Description of exit and disposal activities		On June 12, 2018, our board of directors announced the closure of our upholstery fabrics manufacturing facility in Anderson, South Carolina. This closure was completed during the second quarter of fiscal 2019 and was due to a continued decline in demand for the products manufactured at this facility, reflecting a change in consumer style preferences.
Restructuring credit	$ 214	$ 825
Upholstery Fabrics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring credit and related charges		1,563
Restructuring credit		825
Upholstery Fabrics [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges		2,349
Upholstery Fabrics [Member] | Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related charges		$ 40

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Description of a specific restructuring plan and related activities including the facts and circumstances leading to the restructuring or decision to exit an activity, and the expected completion date. This concept and related items would be utilized for each plan if multiple exit plans have been implemented in the period.

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-Topic 420
-SubTopic 10
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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

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