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Stock-Based Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2015
Stock-Based Compensation Plans [Abstract]  
Share-based Compensation Related to Restricted Stock Awards
The total stock-based compensation expense related to restricted stock awards for the years ended December 31, are as follows (in thousands):

  
2015
  
2014
  
2013
 
Employees
 
$
1,423
  
$
1,104
  
$
1,163
 
Non-employee Directors
  
617
   
510
   
413
 
   Total
 
$
2,040
  
$
1,614
  
$
1,576
 
Stock-based Compensation Expense
Stock-based compensation consisted of restricted stock awards, was included in contract costs and the following line items on the accompanying statements of income for the years ended December 31, 2015, 2014 and 2013 (in thousands):
 
  
2015
  
2014
  
2013
 
Stock-based compensation included in contract costs
 
$
2,081
  
$
1,739
  
$
1,576
 
Income tax benefit recognized for stock-based compensation
  
(800
)
  
(669
)
  
(606
)
  Total stock-based compensation expense,  net of income tax benefit
 
$
1,281
  
$
1,070
  
$
970