Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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

Summary of Significant Accounting Policies (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013 segment	Dec. 29, 2012	Dec. 31, 2011
Goodwill
Number of reporting units	1
Goodwill impairment	$ 0	$ 71,394	$ 0
Minimum
Intangible assets
Remaining useful lives	4 years
Maximum
Intangible assets
Remaining useful lives	10 years