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Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2012
Stockholders' Equity [Abstract]  
Schedule of restricted stock activity
 
   
Number of
shares
   
Weighted-
average
grant
price
 
Balance, December 31, 2011
    380,944     $ 194.26  
Grants
    82,741     $ 111.44  
Vested shares
    (20,004 )   $ 217.77  
Forfeitures
    (907 )   $ 132.23  
Balance, June 30, 2012
    442,774     $ 178.39  
 
Schedule of stock option activity
 
   
Number of
shares
   
Weighted-
average
exercise
price
   
Weighted-
average
remaining
contractual
life (yrs.)
   
Aggregate
intrinsic
value (1)
(in thousands)
 
Balance, December 31, 2011
    100,000     $ 107.28       1.1        
Grants
                           
Exercises
                           
Forfeitures
                           
Balance, June 30, 2012
    100,000     $ 107.28       0.6     174  
Exercisable, June 30, 2012
    100,000     $ 107.28       0.6     174  
 
(1)
The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between the Company’s closing stock price on the respective trading day and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on the respective trading day. The amount of aggregate intrinsic value will change based on the fair market value of the Company’s common stock.
 
Schedule of stock-based compensation expense
 
 
   
For the three months
ended June 30,
   
For the six months
ended June 30,
 
   
2011
   
2012
   
2011
   
2012
 
Instruction and educational support
  $ 972     $ 891     $ 1,823     $ 1,562  
Marketing
    16             35        
Admissions advisory
                       
General and administration
    2,447       2,549       4,470       4,268  
Stock-based compensation expense included in operating expense
    3,435       3,440       6,328       5,830  
Tax benefit
    1,357       1,359       2,500       2,302  
Stock-based compensation expense, net of income tax
  $ 2,078     $ 2,081     $ 3,828     $ 3,528  
 
Schedule of information regarding share-based payment arrangements
   
For the six months ended
June 30,
 
   
2011
   
2012
 
Proceeds from stock options exercised
  $     $  
Tax shortfall related to exercise of stock options and vesting of restricted stock
  $ (872 )   $ (393 )
Intrinsic value of stock options exercised (1) 
  $     $