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. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Pension Plan [Member]
Service cost	$ 205	$ 242	$ 612	$ 739
Interest cost	909	1,095	2,703	3,270
Expected return on plan assets	1,245	1,329	3,733	3,992
Amortization of transition obligation	(9)	(9)	(26)	(26)
Amortization of prior service cost	(4)	1	(11)	3
Amortization of actuarial net loss	673	678	2,241	2,033
Net periodic benefit cost	547	696	1,838	2,079
Other Postretirement Benefits Plan [Member]
Service cost	4	5	13	14
Interest cost	55	76	164	228
Amortization of prior service cost	(69)		(206)
Amortization of actuarial net loss		(69)		(206)
Net periodic benefit cost	$ (10)	$ 12	$ (29)	$ 36