Note G - Pension and Other Postretirement Benefit Plans - Net Funded Status of Pension and Postretirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 26, 2021	Mar. 27, 2020	Mar. 26, 2021	Mar. 27, 2020
Pension Plan [Member]
Service cost	$ 144	$ 205	$ 432	$ 612
Prior service cost	16	0	48	0
Interest cost	715	909	2,072	2,703
Expected return on plan assets	1,133	1,245	3,400	3,733
Amortization of transition obligation	(9)	(9)	(28)	(26)
Amortization of prior service cost	(4)	(4)	(12)	(11)
Amortization of actuarial net loss	811	673	2,434	2,241
Net periodic benefit cost	558	547	1,602	1,838
Other Postretirement Benefits Plan [Member]
Service cost	4	4	12	13
Interest cost	39	55	116	164
Amortization of prior service cost	(69)	(69)	(206)	(206)
Net periodic benefit cost	$ (26)	$ (10)	$ (78)	$ (29)