XML 58 R38.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stockholders' Equity (Schedule Of Stock-Based Compensation Expense) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Stock-based compensation expense included in operating expense $ 2,390 $ 2,892
Tax benefit 944 1,142
Stock-based compensation expense, net of income tax 1,446 1,750
Instruction And Educational Support [Member]
    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Stock-based compensation expense included in operating expense 671 852
Marketing [Member]
    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Stock-based compensation expense included in operating expense   16
Admissions Advisory [Member]
    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Stock-based compensation expense included in operating expense      
General And Administration [Member]
    
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Stock-based compensation expense included in operating expense $ 1,719 $ 2,024