Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Details Textual)

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Acquisitions (Details Textual) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Dec. 28, 2013
Apr. 01, 2013
Mar. 30, 2013
Sep. 27, 2014
Series of Individually Immaterial Business Acquisitions [Member]
Apr. 01, 2013
Series of Individually Immaterial Business Acquisitions [Member]
Sep. 27, 2014
Trade Name
Dec. 28, 2013
Trade Name
Apr. 01, 2013
Trade Name
Series of Individually Immaterial Business Acquisitions [Member]
Sep. 27, 2014
Noncompete Agreements [Member]
Dec. 28, 2013
Noncompete Agreements [Member]
Apr. 01, 2013
Noncompete Agreements [Member]
Series of Individually Immaterial Business Acquisitions [Member]
Sep. 27, 2014
Technology
Dec. 28, 2013
Technology
Sep. 27, 2014
Technology
Series of Individually Immaterial Business Acquisitions [Member]
Apr. 01, 2013
Technology
Series of Individually Immaterial Business Acquisitions [Member]
Sep. 27, 2014
Developed Technology Rights [Member]
Series of Individually Immaterial Business Acquisitions [Member]
Apr. 01, 2013
Developed Technology Rights [Member]
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]                                      
Purchase of Remaining Interest in Equity Investee       60.00%                              
Goodwill arising from acquisition $ 5,242   $ 5,221       $ 726                        
Gross carrying amount 3,404   3,404       746 774 774   11 11   1,751 1,751        
Finite-Lived Trade Names, Gross                   18                  
Acquired definite lived intangible assets                                     441
Acquisition related costs           12                          
Finite-Lived Intangible Asset, Useful Life               1 year     2 years         15 years   10 years  
Finite-Lived Customer Relationships, Gross                                 276    
Finite-Lived Noncompete Agreements, Gross                         11            
Gain on Purchase of Business 0 528       528                          
Equity Method Investment, Ownership Percentage         40.00%                            
Transaction cost arising from acquisition       $ 1,000