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Pension Plans (Tables)
9 Months Ended
Sep. 27, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
The following table summarizes the components of net periodic pension cost recorded for the Company’s defined benefit pension plans (in thousands):
 
 
 
 
Three Months 
Ended
September 27,
2013
 
 
Three Months
 Ended
September 28,
2012
 
 
Nine Months
Ended
September 27,
2013
 
 
Nine Months
Ended
September 28,
2012
 
Service cost
 
$
81
 
$
122
 
$
284
 
$
364
 
Interest cost
 
 
 
 
34
 
 
52
 
 
102
 
Expected return on plan assets
 
 
(25)
 
 
(28)
 
 
(73)
 
 
(81)
 
Amortization of unrecognized transitional
    obligation
 
 
 
 
4
 
 
4
 
 
12
 
Amortization of prior service cost
 
 
 
 
 
 
 
 
(1)
 
Recognized actuarial gain
 
 
(69)
 
 
(1)
 
 
(50)
 
 
(4)
 
 
 
$
(13)
 
$
131
 
$
217
 
$
392