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Segment Reporting - Summary Financial Information by Reporting Segment (Parenthetical) (Detail) (USD $)
 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2012
CTU [Member]
Dec. 31, 2012
CTU [Member]
Dec. 31, 2011
CTU [Member]
Dec. 31, 2013
Health Education [Member]
Dec. 31, 2012
Health Education [Member]
Dec. 31, 2011
Health Education [Member]
Dec. 31, 2013
Culinary Arts [Member]
Dec. 31, 2012
Culinary Arts [Member]
Dec. 31, 2011
Culinary Arts [Member]
Dec. 31, 2012
Design & Technology [Member]
Dec. 31, 2013
Design & Technology [Member]
Dec. 31, 2012
Design & Technology [Member]
Dec. 31, 2011
Design & Technology [Member]
Dec. 31, 2012
Corporate and Other [Member]
Dec. 31, 2011
Corporate and Other [Member]
Dec. 31, 2013
Transitional Schools [Member]
Dec. 31, 2012
Transitional Schools [Member]
Dec. 31, 2011
Transitional Schools [Member]
Dec. 31, 2013
DTEG Ongoing Schools [Member]
Dec. 31, 2013
DTEG Facilities [Member]
Segment Reporting Information [Line Items]                                                      
Goodwill and asset impairment     $ 85,600,000   $ 22,691,000 $ 127,007,000 $ 191,524,000       $ 1,700,000 $ 44,800,000   $ 13,000,000 $ 8,100,000 $ 94,100,000                 $ 37,300,000    
Preliminary settlement legal matters                     8,800,000                       1,700,000        
Pending legal settlement 15,500,000                         15,500,000                          
Asset impairments charges 7,000,000 40,800,000     22,687,000 125,529,000 191,524,000                     4,100,000         2,600,000     (2,300,000) (1,800,000)
Goodwill Impairment           83,350,000 168,700,000          41,293,000              40,752,000         1,305,000      
Insurance recovery related to the settlement of claims under certain insurance policies       19,000,000                                 19,000,000 7,000,000          
Goodwill and asset impairment charges                         59,900,000                     30,700,000      
Administrative expense for an estimate for potential reimbursements of government funds                   5,000,000                                  
Settlement of administrative expense               3,600,000                 4,800,000                    
Legal expense related to the settlements of legal matters                                       $ 6,000,000