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Retirement Plans (Tables)
 9 Months Ended
Sep. 28, 2014
Compensation and Retirement Disclosure [Abstract]  
Net Periodic Cost Associated With Defined-Benefit Pension And Other Post-Retirement Benefit Plans
Net periodic cost associated with our defined-benefit pension and other post-retirement benefit plans for the three- and nine-month periods ended September 29, 2013, and September 28, 2014, consisted of the following:

 
Pension Benefits
Other Post-retirement Benefits
Three Months Ended
September 29, 2013
 
September 28, 2014
September 29, 2013
 
September 28, 2014
Service cost
$
80

 
$
49

$
4

 
$
3

Interest cost
124

 
133

13

 
13

Expected return on plan assets
(148
)
 
(164
)
(7
)
 
(8
)
Recognized net actuarial loss
106

 
73

6

 
2

Amortization of prior service (credit) cost
(16
)
 
(16
)
2

 
—

Net periodic cost
$
146

 
$
75

$
18

 
$
10


 
Pension Benefits
Other Post-retirement Benefits
Nine Months Ended
September 29, 2013
 
September 28, 2014
September 29, 2013
 
September 28, 2014
Service cost
$
240

 
$
145

$
12

 
$
9

Interest cost
372

 
399

39

 
39

Expected return on plan assets
(444
)
 
(492
)
(21
)
 
(24
)
Recognized net actuarial loss
318

 
221

18

 
7

Amortization of prior service (credit) cost
(46
)
 
(50
)
6

 
(1
)
Net periodic cost
$
440

 
$
223

$
54

 
$
30