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Acquisitions (Tables)
 3 Months Ended
Mar. 31, 2013
Acquisitions [Abstract]  
Summary of reserve activity for facility closure costs
The following table summarizes the reserve activity from December 31, 2012 through March 31, 2013:
 
 
Beginning of
 
 
 
 
 
 
 
 
End of
 
 
Period
 
 
Adjustments
 
 
Payments
 
 
Period
 
 
 
 
 
 
 
 
 
 
 
 
 
First quarter
 
$
324
 
 
$
(31
)
 
$
(21
)
 
$
272