Other Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Component of Operating Income [Abstract]
Net gains	$ (47)us-gaap_OtherOperatingIncomeExpenseNet	$ (17)us-gaap_OtherOperatingIncomeExpenseNet	$ 717us-gaap_OtherOperatingIncomeExpenseNet

The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.

No definition available.

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