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Equity (Tables)
 9 Months Ended
Sep. 30, 2016
Equity [Abstract]  
Treasury Stock
The following table shows the number of shares withheld for taxes and the associated value of those shares for the nine-month periods ended September 30, 2016 and 2015. These shares were accounted for as treasury stock when withheld and then immediately retired.
 
 
Nine Months Ended September 30,
 
 
2016
 
2015
 
 
(In thousands)
Number of shares withheld for taxes
 
1,122

 
1,699

Value of shares withheld for taxes
 
$
44

 
$
2,347