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Restructuring Charges - Restructuring Charges by Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Restructuring and Related Cost [Abstract]        
Severance and related expenses [1],[2] $ 52 $ 3,195 $ 13,432 $ 3,195
CTU [Member]        
Restructuring and Related Cost [Abstract]        
Severance and related expenses 18 426 306 426
AIU [Member]        
Restructuring and Related Cost [Abstract]        
Severance and related expenses 4 96 343 96
University Group [Member]        
Restructuring and Related Cost [Abstract]        
Severance and related expenses 22 522 649 522
Corporate and Other [Member]        
Restructuring and Related Cost [Abstract]        
Severance and related expenses   997 4,318 997
Transitional Group [Member]        
Restructuring and Related Cost [Abstract]        
Severance and related expenses $ 30 $ 1,676 $ 8,465 $ 1,676
[1] Includes charges related to COBRA and outplacement services which are assumed to be completed by the third month following an employee’s departure.
[2] Severance payments will result in future cash expenditures through 2018.