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Retirement Plans (Tables)
3 Months Ended
Mar. 31, 2013
Compensation and Retirement Disclosure [Abstract]  
Net periodic pension cost
Net periodic pension cost are as follows:
 
Three Months Ended
March 31,
 
2013
 
2012
Service cost
$
8

 
$
18

Interest cost
65

 
72

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

 
25

Net periodic pension cost
$
10

 
$
38

Company contributions
$
123

 
$
76