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Commitments and Contingencies - Additional Information (Detail) (USD $)
 6 Months Ended 6 Months Ended 3 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended
Jun. 30, 2013
Plaintiff
Person
Dec. 31, 2012
Jan. 13, 2012
Findings
Jun. 30, 2013
Derivatives [Member]
Jun. 30, 2013
Ross [Member]
May 03, 2012
Ross [Member]
Defendant
Jun. 30, 2013
Vasquez [Member]
Claim
Aug. 10, 2012
Vasquez [Member]
Person
Arbitration
Jun. 15, 2012
Vasquez [Member]
Claim
Sep. 30, 2012
Code of Civil Procedure [Member]
Plaintiff
Apr. 25, 2010
Sumrall [Member]
D
Jun. 30, 2013
NYAGMember
Jun. 30, 2013
Amador [Member]
Plaintiff
Lawsuits
Sep. 27, 2007
Amador [Member]
Plaintiff
Jan. 18, 2013
Coleman case [Member]
Person
Apr. 22, 2011
Surrett [Member]
Student
May 23, 2012
Surrett [Member]
Members
Apr. 10, 2008
Surrett [Member]
Claim
Mar. 05, 2008
Surrett [Member]
Claim
Jun. 30, 2013
Stafford [Member]
Claim
Feb. 28, 2013
Stafford [Member]
Jul. 14, 2008
False Claims Act Lawsuit [Member]
Employees
Jun. 30, 2013
OIG Audit [Member]
Jun. 03, 2011
Abarca [Member]
Person
Jun. 15, 2011
Andrade [Member]
Person
Aug. 12, 2011
Aprieto [Member]
Person
Product Liability Contingency [Line Items]                                                    
Accrual for legal fees and settlements $ 49,400,000 $ 6,500,000                                                
Insurance recovery pending settlement of legal matters 32,500,000     20,000,000 22,500,000                                          
Number of executive officers as defendants           2                                        
Loss contingency range of possible loss maximum         27,500,000             10,000,000                     800,000      
Insurance recovery to be transferred       10,000,000 10,000,000                                          
Remaining settlement amount to be paid         5,000,000                                          
Insurance recovery in dispute         5,000,000                                          
Insurance recovery to be allocated to other liabilities       10,000,000                                            
Number of student plaintiffs 1,000                         36                        
Number of opt-out Individuals                                               115 31 5
Number of individuals represented new counsel 78                           2                      
Number of suits prosecuted                         4                          
Number of plaintiffs who have not settled                         80                          
Minimum number of test cases to be tried to the Court 8                                                  
Maximum number of test cases to be tried to the Court 10                                                  
Number of alleged claims for equitable relief                                     2              
Number of claims added for money damages                                   2                
Number of students in class                               2,600                    
Opt-out period expiration date                               2011-06-20                    
Number of individuals WCI file motion to compel arbitration                                 1,062                  
Number of mass action filed             8   8                                  
Number of individuals that signed arbitration agreement               54                                    
Number of individuals have filed arbitration demands               9                                    
Number of arbitrations which have been tried to final award               1                                    
Number of arbitrations which have settled               7                                    
Number of arbitrations set for hearing               1                                    
Number of individual plaintiffs sent offers to compromise                   1,478                                
Number of offers to compromise accepted to date                   345                                
Aggregate amount of payments made                   2,100,000                                
Number of recently added new plaintiff                   385                                
Number of active plaintiffs in consolidated action                   1,052                                
Number of claims for negligent and willful violation of TCPA                                       2            
Injunctive relief statutory and treble damages seeks by plaintiff                                         $ 1,500          
Number of former employees who filed complaint                                           4        
Number Of Hours Per Week                     40                              
Number of OIG Findings     3                                              
Number of documentation of attendance of students enrolled in CTU's     1                                              
Number of calculation of returns of Title IV Program funds     1