XML 54 R42.htm IDEA: XBRL DOCUMENT v3.10.0.1
Defined Benefit Pension Plans (Details 1) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 29, 2018
Jun. 30, 2017
Jun. 29, 2018
Jun. 30, 2017
Swiss pension plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 79 $ 67 $ 145 $ 131