XML 45 R40.htm IDEA: XBRL DOCUMENT v2.4.0.6
Significant Accounting Policies (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Significant Accounting Policies [Abstract]      
Percentage of tuition revenue to total revenue 98.00%    
Estimated useful life, minimum (in years) 3    
Estimated useful life, maximum (in years) 40    
Depreciation and amortization $ 21,525 $ 17,309 $ 13,937
Lease term, minimum, years 5    
Lease term, maximum, years 10    
Common stock, par value per share $ 0.01 $ 0.01  
Common stock, shares authorized 20,000,000 20,000,000  
Common stock, shares issued 11,792,456 13,316,822  
Common stock, shares outstanding 11,792,456 13,316,822  
Preferred stock, shares authorized 8,000,000