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Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Mar. 31, 2011
Derivative Contract Details (Textual) [Abstract]        
Due to related parties $ 279 $ 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      
Pledged collateral as noncurrent restricted cash 555 555    
Reduced pledge collateral 555 555    
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 27 53    
Interest expense on derivatives related to credit risk 3      
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 23,865     19,769
Arrangement expense 447     401
Amortization of other current assets Next twelve month cycle      
Mind Streams [Member]
        
Derivative Contract Details (Textual) [Abstract]        
Due to related parties 239 212    
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      
Interest rate receivable on interest rate swap amortizing notional amount 30 Day LIBOR 30 Day LIBOR    
Fixed Interest rate payable on interest rate swap amortizing notional amount 3.245%      
Notional amount of interest rate swap 10,413      
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    
Maturity date of derivative agreements Apr. 30, 2014      
Inception date of derivative agreements Jun. 30, 2009      
Notional amount of interest rate swap 10,413      
Interest rate payable on interest rate corridor if 30 day LIBOR is less than 4% 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%    
Interest rate payable on interest rate corridor 30 day LIBOR exceeds 6% 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 $ 585 $ 629