Pension and Postretirement Benefits - Summary of Net Periodic Benefit Cost Recognized (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 26, 2021	Sep. 27, 2020
SERP Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service Cost	$ 16	$ 16
Interest Cost	13	10
Amortization of Unrecognized Net Loss	22	3
Net Periodic Benefit Cost	51	29
Postretirement Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service Cost	3	3
Interest Cost	3	4
Amortization of Prior Service Credit		(2)
Amortization of Unrecognized Net Loss	84	89
Net Periodic Benefit Cost	$ 90	$ 94