Retirement Plans and Postretirement Costs (Details 9) - USD ($) $ in Thousands	12 Months Ended
Jul. 01, 2018	Jul. 02, 2017	Jul. 03, 2016
Compensation And Retirement Disclosure [Abstract]
Employer contribution defined contribution plan	$ 1,793	$ 1,805	$ 1,783

Amount of cost for defined contribution plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration