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Summary of Significant Accounting Policies (Details Textual) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Derivative Contract Details (Textual) [Abstract]          
Due to related parties $ 319   $ 319 $ 227  
Summary of Significant Accounting Policies (Textual) [Abstract]          
Average days from the date of receipt in which funds remain as restricted cash and cash equivalents     60 to 90 Days    
Reduced pledge collateral 375   375 555  
Amount paid to settle the qui tam matter as restricted cash         5,200
Debt inception dates     Apr. 01, 2009    
Debt maturity Dates     Mar. 01, 2016    
Loss on derivatives included as a component of other comprehensive income, net of taxes     62 1  
Interest expense on derivatives related to credit risk     2    
Percent of financial aid earn by student     100.00%    
Period for write off inactive student accounts     150 days    
Reduction in revenue due to scholarships offered to students     44,099 34,939  
Arrangement expense 594 2 1,041   403
Amortization of other current assets     Next twelve month cycle    
Mind Streams [Member]
          
Derivative Contract Details (Textual) [Abstract]          
Due to related parties 307   307 212  
Interest Rate Swap [Member]
          
Derivative Contract Details (Textual) [Abstract]          
Maturity date of derivative agreements     Apr. 30, 2014    
Inception date of derivative agreements     May 01, 2010    
Pledged collateral as noncurrent restricted cash 375   375 555  
Interest rate receivable on interest rate swap amortizing notional amount 30 Day LIBOR   30 Day LIBOR 30 Day LIBOR  
Fixed Interest rate payable on interest rate swap amortizing notional amount 3.245%   3.245%    
Notional amount of interest rate swap 10,199   10,199    
Amount of derivative ineffectiveness for the interest rate swap     0    
Summary of Significant Accounting Policies (Textual) [Abstract]          
Inception date of derivative agreements     May 01, 2010    
Maturity date of derivative agreements     Apr. 30, 2014    
Interest Rate Corridor [Member]
          
Derivative Contract Details (Textual) [Abstract]          
Fair value of interest rate corridor included in other assets 1   1 1  
Maturity date of derivative agreements     Apr. 30, 2014    
Inception date of derivative agreements     Jun. 30, 2009    
Notional amount of interest rate swap 10,199   10,199    
Interest rate payable on interest rate corridor if 30 day LIBOR is less than 4% 30 Day LIBOR   30 Day LIBOR 30 Day LIBOR  
Interest rate payable on interest rate corridor 30 day LIBOR equal to 4% through 6% 4.00%   4.00% 4.00%  
Interest rate payable on interest rate corridor 30 day LIBOR exceeds 6% 30 Day LIBOR less 2%   30 Day LIBOR less 2% 30 Day LIBOR less 2%  
Summary of Significant Accounting Policies (Textual) [Abstract]          
Inception date of derivative agreements     Jun. 30, 2009    
Maturity date of derivative agreements     Apr. 30, 2014    
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
          
Derivative Contract Details (Textual) [Abstract]          
Fair value of interest rate swap is a liability, which is included in other non current liability $ 522   $ 522 $ 629