XML 56 R38.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies (Details 3) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Goodwill [Roll Forward]    
Goodwill balance at beginning of year $ 224,553 $ 187,791
Acquisitions 58,332 38,061
Finalization of purchase price allocations and effect of foreign currency translation 4,097 (1,299)
Goodwill balance at end of year $ 286,982 $ 224,553