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Stock Options, Restricted Stock and Restricted Stock Units (Tables)
3 Months Ended
Mar. 31, 2014
Stock Options, Restricted Stock and Restricted Stock Units [Abstract]  
Schedule of restricted stock and restricted stock units activity
 
  
Number
of shares
or units
  
Weighted-
average grant
price
 
Balance, December 31, 2013
  
487,773
  
$
131.51
 
Grants
  
46,064
  
$
33.65
 
Vested shares
  
(46,963
)
 
$
182.23
 
Forfeitures
  
(227
)
 
$
132.23
 
Balance, March 31, 2014
  
486,647
  
$
124.65
 
Schedule of stock option activity and other stock option information

 
Number of
shares
   
Weighted-average exercise price
   
Weighted-average remaining
contractual
life (years)
   
Aggregate intrinsic
value(1)
(in thousands)
 
Balance, December 31, 2013
   
100,000
   
$
51.95
     
7.0
   
$
 
Grants
   
     
                 
Exercises
   
     
                 
Forfeitures/Expirations
   
     
                 
Balance, March 31, 2014
   
100,000
   
$
51.95
     
6.8
   
$
 
Exercisable, March 31, 2014
   
   
$
     
   
 
 
Schedule of stock-based compensation expense
 
  
For the three months
ended March 31,
 
  
2013
  
2014
 
Instruction and educational support
 
$
1,097
  
$
434
 
Marketing
  
   
 
Admissions advisory
  
   
 
General and administration
  
1,153
   
1,527
 
Stock-based compensation expense included in operating expense
  
2,250
   
1,961
 
Tax benefit
  
895
   
781
 
Stock-based compensation expense, net of income tax
 
$
1,355
  
$
1,180