Inventories - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Sep. 24, 2021	Sep. 25, 2020	Sep. 24, 2021	Sep. 25, 2020
Inventory Disclosure [Abstract]
Recorded inventory provisions	$ 1,852	$ 490	$ 5,041	$ 2,073
Disposal Group, Not Discontinued Operations \| Voxtel Product Line
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Recorded inventory provisions	$ 271		$ 3,106

Amount, before tax, of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a disposal group. Excludes discontinued operations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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