Pension and Postretirement Benefits (Details Textual) - USD ($)	3 Months Ended
	Sep. 26, 2021	Jun. 27, 2021
Defined Benefit Plan Disclosure [Line Items]
Rabbi Trust Assets - SERP	$ 3,600,000	$ 3,600,000
Postretirement plan annual benefit limit for future eligible retirees	$ 4,000
Other postretirement benefits maximum benefit period	5 years
Supplemental Employee Retirement Plan, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Percentage of participant's base salary received as Supplemental Retirement Benefits	8.00%
Vesting period, SERP	5 years