Pension and Postretirement Benefits - Summary of Net Periodic Benefit Cost Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 27, 2022	Mar. 28, 2021	Mar. 27, 2022	Mar. 28, 2021
SERP Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service Cost	$ 15	$ 16	$ 46	$ 47
Interest Cost	15	10	40	31
Amortization of Unrecognized Net Loss	20	3	63	8
Net Periodic Benefit Cost	50	29	149	86
Postretirement Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service Cost	3	3	9	10
Interest Cost	4	4	10	12
Amortization of Prior Service Credit		(2)		(6)
Amortization of Unrecognized Net Loss	82	91	247	269
Net Periodic Benefit Cost	$ 89	$ 96	$ 266	$ 285