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Defined Benefit Pension Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 02, 2015
Oct. 03, 2014
Oct. 02, 2015
Oct. 03, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ 107 $ 116 $ 321 $ 349
Interest cost 19 30 57 102
Expected return on plan assets (22) (22) (64) (76)
Net amortization of transitional obligation [1] 3 0 8 0
Actuarial loss recognized in current period [1] 12 6 37 18
Total $ 119 $ 130 $ 359 $ 393
[1] Amounts reclassified from accumulated other comprehensive income.