Note 4 - Inventories (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 31, 2022	Jan. 01, 2022	Dec. 31, 2022	Jan. 01, 2022	Mar. 31, 2022
Inventory, LIFO Reserve	$ 243,826	$ 159,326	$ 243,826	$ 159,326	$ 164,493
Inventory, LIFO Reserve, Period Charge	$ 30,900	$ 19,000	$ 79,300	$ 30,700

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.L)
-URI https://asc.fasb.org/extlink&oid=27011343&loc=d3e99989-122729

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