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Retirement Plans (Tables)
 6 Months Ended
Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract]  
Net periodic pension cost
Net periodic pension cost are as follows:
 
Three Months Ended
June 30,
 
Six Months Ended
 June 30,
 
2013
 
2012
 
2013
 
2012
Service cost
$
8

 
$
18

 
$
16

 
$
35

Interest cost
65

 
72

 
130

 
144

Expected return on assets
(91
)
 
(77
)
 
(182
)
 
(153
)
Amortization of actuarial net loss
28

 
25

 
56

 
50

Net periodic pension cost
$
10

 
$
38

 
$
20

 
$
76

Company contributions
$
80

 
$
123

 
$
203

 
$
199