Note M - Pension and Other Postretirement Benefit Plans - Defined Benefit Plan Estimated Future Benefit Payments (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Pension Plan [Member]
2022	$ 8,535
2023	7,794
2024	7,433
2025	7,095
2026	6,865
Years 2027 - 2031	31,435
Other Postretirement Benefits Plan [Member]
2022	843
2023	769
2024	693
2025	608
2026	544
Years 2027 - 2031	$ 2,042

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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