Commitments and contingencies Litigation settlement (Details Textuals 2) (USD $)	3 Months Ended	6 Months Ended
Dec. 28, 2013	Sep. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Litigation Settlement [Abstract]
Gain on legal settlement, bargain purchase and other	$ 0	$ 19,100,000	$ 59,000	$ 19,137,000	$ 31,350,000
Possible future gain from legal settlement		$ 4,000,000

The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 30

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6397426&loc=d3e17499-108355

Name:	us-gaap_GainContingencyUnrecordedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant