Retirement Plans and Postretirement Costs (Details Textual) - USD ($)	12 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jul. 01, 2018
Defined Benefit Plan Disclosure [Line Items]
Date the Board of Directors freeze benefit accruals and future eligibility under the Qualified Pension Plan	Dec. 31, 2009
Termination of Qualified Pension Plan, description	The Board of Directors has subsequently approved to proceed with the termination of the Qualified Pension Plan. During the quarter ended December 30, 2018, we completed a substantial portion of terminating the Qualified Pension Plan. In connection with the termination of the Qualified Pension Plan, distributions from the Qualified Pension Plan trust were made during the three month period ended December 30, 2018 to participants who elected lump-sum distributions. Additionally, during the three months ended December 30, 2018, we entered into an agreement with an insurance company to purchase from us, through a series of annuity contracts, our remaining obligations under the Qualified Pension Plan and, as a result, we settled the remaining obligations under the plan for the remaining participants utilizing funds available in the Qualified Pension Plan trust.
Additional contributions for termination of Qualified Pension Plan	$ 0
Non-cash pre-tax settlement charge		$ 31,878,000
Non-cash compensation expense	4,824,000	4,195,000
Rabbi Trust Assets - SERP	2,900,000	$ 2,900,000
Postretirement plan annual benefit limit for future eligible retirees	$ 4,000
Other postretirement benefits maximum benefit period	5 years
Fair value of pension plan assets	$ 0
Health care cost trend rate for next fiscal year	6.71%
Ultimate health care cost trend rate	3.00%
401(K) Plan
Defined Benefit Plan Disclosure [Line Items]
Percent of each dollar of eligible employee contributions matched by employer	100.00%
Employer matching contribution to employee up to participant's eligible contribution	5.00%
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Qualified pension plan weighted-average asset allocation, percentage		100.00%
Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets		$ 8,600,000
Other Current Assets
Defined Benefit Plan Disclosure [Line Items]
Rabbi Trust Assets - SERP	$ 217,000
Other Long-Term Assets
Defined Benefit Plan Disclosure [Line Items]
Rabbi Trust Assets - SERP	$ 2,700,000
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
Projected benefit obligation	$ 2,293,000	2,169,000
Expected employer contributions in next fiscal year	1,000,000.0
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	821,000	$ 914,000	$ 1,041,000
Expected employer contributions in next fiscal year	$ 119,000