Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Business Combinations [Abstract]
Non-cash loss due to write-off of non-operating items	$ 822	$ 2,670	$ 822	$ 2,670

Amount of gain (loss) on sale or disposal of an equity method investment.

No definition available.

Name:	us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration