Income Taxes Valuation Allowance Rollforward (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 30, 2011
Valuation Allowance Rollforward [Abstract]
Balance, beginning of year	$ (57,734)	$ (46,323)	$ (20,027)
Additions	(18,852)	(11,411)	(26,296)
Reductions	0	0	0
Balance, end of year	$ (76,586)	$ (57,734)	$ (46,323)

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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