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Share-Based Employee Compensation (Tables)
 9 Months Ended
Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
The table below summarizes the amounts recognized in the financial statements for the three and nine months ended September 30, 2016 and 2015 for share-based compensation, including expense for stock options, restricted stock units, phantom stock units, cash settled stock appreciation rights and performance share units.
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
 
2016
 
2015
 
2016
 
2015
 
(In thousands)
Cost of sales
$
198

 
$
120

 
$
520

 
$
563

Operating expenses
2,067

 
1,350

 
6,280

 
7,574

Total cost of share-based compensation included in income, before income tax
$
2,265

 
$
1,470

 
$
6,800

 
$
8,137