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Related Party Transactions (Details) - USD ($) $ in Thousands				3 Months Ended		9 Months Ended
	Jan. 26, 2023	Jan. 02, 2023	Dec. 02, 2021	Dec. 23, 2022	Dec. 24, 2021	Dec. 23, 2022	Dec. 24, 2021	Sep. 23, 2022	Jul. 01, 2022	Mar. 25, 2022
Related Party Transaction [Line Items]
Total net sales				$ 248,789	$ 186,629	$ 704,208	$ 568,381
Trade and other accounts receivable due from related party				31,070		31,070				$ 27,360
Amounts due to related party				$ 5,659		5,659				5,222
Periodic payment						2,005
Interest income						$ 130
Subsequent Event
Related Party Transaction [Line Items]
Periodic payment		$ 1,009
Interest income		$ 72
Sanken
Related Party Transaction [Line Items]
Ownership percentage by majority shareholder				51.50%		51.50%
Sanken \| Polar Semiconductor, LLC
Related Party Transaction [Line Items]
Ownership percentage by majority shareholder								70.00%
Allegro Microsystems, Inc. \| Polar Semiconductor, LLC
Related Party Transaction [Line Items]
Ownership percentage by majority shareholder								30.00%
Sanken
Related Party Transaction [Line Items]
Trade and other accounts receivable due from related party				$ 30,902		$ 30,902				27,256
Other accounts receivable from related party				168		168				104
Sanken \| Related Party Revenue
Related Party Transaction [Line Items]
Total net sales				45,117	39,461	131,852	112,079
PSL
Related Party Transaction [Line Items]
Purchases from related party				15,995	$ 11,837	45,145	$ 38,346
Amounts due to related party				5,659		5,659				$ 5,222
PSL \| Subsequent Event \| Wafer Foundry Agreement
Related Party Transaction [Line Items]
Purchase commitment period	3 years
PSL \| Subsequent Event \| Wafer Foundry Agreement, Renewal Term
Related Party Transaction [Line Items]
Related party transaction, term	1 year
PSL \| Subsequent Event \| Wafer Foundry Agreement, Termination Notice Period
Related Party Transaction [Line Items]
Related party transaction, term	2 years
PSL \| Subsequent Event \| Wafer Foundry Agreement, Forecast Term
Related Party Transaction [Line Items]
Related party transaction, term	3 years
PSL \| Subsequent Event \| Wafer Foundry Agreement, Binding Years
Related Party Transaction [Line Items]
Related party transaction, term	2 years
PSL \| Subsequent Event \| Wafer Foundry Agreement, Mask Pricing Term
Related Party Transaction [Line Items]
Related party transaction, term	2 years
PSL \| Initial PSL Loan \| Loans Payable
Related Party Transaction [Line Items]
Term			4 years
Principal amount			$ 7,500						$ 7,500
Interest rate			1.26%
Outstanding balance				$ 13,125		$ 13,125