Significant Accounting Policies (Details)	3 Months Ended
Mar. 29, 2014 item
Significant Accounting Policies
Number of Spanish companies consolidated in financial statements	2
Ownership interest in Spanish companies (as a percent)	50.00%

Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

No definition available.

Name:	us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant