Retirement Plans and Postretirement Costs (Details 9) - USD ($) $ in Thousands	12 Months Ended
Jun. 28, 2015	Jun. 29, 2014	Jun. 30, 2013
Compensation And Retirement Disclosure [Abstract]
Employer contribution defined contribution plan	$ 1,729	$ 1,605	$ 1,464

The amount of the cost recognized during the period for defined contribution plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-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