Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 29, 2013	Sep. 23, 2012	Sep. 29, 2013	Sep. 23, 2012
Accumulated Other Comprehensive Income
Net interest (expense) income	$ (185)	$ (342)	$ 147	$ (939)
Qualifying as hedges \| Interest rate swap \| Amount reclassified from AOCI
Accumulated Other Comprehensive Income
Net interest (expense) income	$ 165	$ 37	$ 254	$ 107

The net amount of nonoperating interest income (expense).

No definition available.

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