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Share-Based Employee Compensation (Tables)
 6 Months Ended
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-Based Compensation Including Expense for Phantom Stock Units and Cash Settled Stock Appreciation Rights Granted to Employees
The table below summarizes the amounts recognized in the financial statements for the three and six months ended June 30, 2015 and 2014 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 
 June 30,
 
Six Months Ended 
 June 30,
 
2015
 
2014
 
2015
 
2014
 
(In thousands)
Cost of sales
$
106

 
$
(183
)
 
$
443

 
$
126

Operating expenses
1,191

 
(2,071
)
 
6,224

 
2,955

Total cost of share-based compensation included in income, before income tax
$
1,297

 
$
(2,254
)
 
$
6,667

 
$
3,081