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Restructuring and Contract Termination Costs
3 Months Ended
Mar. 30, 2013
Restructuring and Related Activities [Abstract]  
Restructuring and Contract Termination Costs
We have implemented staffing reductions over the past few years to improve operating efficiency and profitability at various sites. As a result of these actions, for the three months ended March 30, 2013 and March 31, 2012, we recorded severance and retention charges as shown below. As of March 30, 2013, $1,791 was included in accrued compensation and $1,644 in other long-term liabilities on our consolidated balance sheet.
The following table rolls forward our severance and retention cost liability:
 
Three Months Ended
 
March 30, 2013
 
March 31, 2012
Balance, beginning of period
$
3,636

 
$
3,374

Expense
297

 
911

Payments/utilization
(498
)
 
(608
)
Balance, end of period
$
3,435

 
$
3,677


The following table presents severance and retention costs by classification on the income statement:
 
Three Months Ended
 
March 30, 2013
 
March 31, 2012
Severance charges included in cost of sales
$
227

 
$

Severance charges included in selling, general and administrative expense
70

 
911

Total expense
$
297

 
$
911


The following table presents severance and retention cost by segment:
 
Three Months Ended
 
March 30, 2013
 
March 31, 2012
Research models and services
$
86

 
$

Preclinical services
211

 
911

Corporate

 

Total expense
$
297

 
$
911