Pension and Postretirement Benefits - Summary of Net Periodic Benefit Cost Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020	Jun. 30, 2019
COMPONENTS OF NET PERIODIC BENEFIT COST:
Plan Settlements					$ 31,900
SERP Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service Cost	$ 16	$ 19	$ 47	$ 56
Interest Cost	10	16	31	46
Amortization of Unrecognized Net Loss	3	4	8	11
Net Periodic Benefit Cost	29	39	86	113
Postretirement Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service Cost	3	3	10	9
Interest Cost	4	6	12	19
Amortization of Prior Service Credit	(2)	(7)	(6)	(22)
Amortization of Unrecognized Net Loss	91	99	269	298
Net Periodic Benefit Cost	$ 96	$ 101	$ 285	$ 304