XML 54 R59.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock Options, Restricted Stock and Restricted Stock Units (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of stock-based compensation expense      
Stock-based compensation expense included in operating expense $ 9,291 $ 5,464 $ 13,234
Tax benefit 3,698 2,158 5,245
Stock-based compensation expense, net of income tax 5,593 3,306 7,989
Instruction and educational support [Member]
     
Schedule of stock-based compensation expense      
Stock-based compensation expense included in operating expense 1,976 3,273 3,635
Marketing [Member]
     
Schedule of stock-based compensation expense      
Stock-based compensation expense included in operating expense       65
Admissions advisory [Member]
     
Schedule of stock-based compensation expense      
Stock-based compensation expense included in operating expense         
General and administration [Member]
     
Schedule of stock-based compensation expense      
Stock-based compensation expense included in operating expense $ 7,315 $ 2,191 $ 9,534