Note 4 - Inventories (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 28, 2024	Dec. 30, 2023	Dec. 28, 2024	Dec. 30, 2023	Mar. 31, 2024
Inventory, LIFO Reserve	$ 347,760	$ 322,083	$ 347,760	$ 322,083	$ 324,782
Inventory, LIFO Reserve, Period Charge	$ 10,900	$ 12,000	$ 23,000	$ 19,600

The change in the inventory reserve representing the cumulative difference in cost between the first in, first out and the last in, first out inventory valuation methods, which change has been reflected in the statement of income during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 330
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.L)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480581/330-10-S99-1

Name:	us-gaap_InventoryLIFOReservePeriodCharge
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration