Note G - Pension and Other Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 25, 2020	Dec. 31, 2021	Dec. 25, 2020
Pension Plan [Member]
Service cost	$ 130	$ 146	$ 269	$ 289
Prior service cost	10	16	20	32
Interest cost	681	690	1,347	1,357
Expected return on plan assets	(1,255)	(1,133)	(2,514)	(2,266)
Amortization of transition obligation	9	9	18	18
Amortization of prior service cost	(4)	(4)	(8)	(8)
Amortization of actuarial net loss	562	811	1,124	1,623
Net periodic benefit cost (gain)	133	535	256	1,045
Service cost	130	146	269	289
Other Postretirement Benefits Plan [Member]
Service cost	4	4	8	8
Interest cost	35	39	70	77
Amortization of prior service cost	(69)	(69)	(138)	(137)
Net periodic benefit cost (gain)	(30)	(26)	(60)	(52)
Service cost	$ 4	$ 4	$ 8	$ 8