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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Weighted Average Shares Outstanding
 
Three months ended
 
 
March 31,
 
 
2017
 
2016
 
Basic shares outstanding
  
101,885
   
101,071
 
Effect of potential common stock:
        
Common stock awards
  
1,193
   
1,172
 
Senior subordinated convertible notes
  
-
   
75
 
Diluted shares outstanding
  
103,078
   
102,318