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Contingencies - Additional Information (Detail)
 6 Months Ended
Apr. 22, 2011
Student
Jun. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
May. 23, 2012
Members
Jan. 13, 2012
Findings
Jul. 14, 2008
Employees
Apr. 10, 2008
Claim
Mar. 05, 2008
Claim
Loss Contingencies [Line Items]                
Accrual for legal fees and settlements | $   $ 1,900,000 $ 2,300,000          
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      
Surrett [Member]                
Loss Contingencies [Line Items]                
Number of alleged claims for equitable relief | Claim               2
Number of claims added for money damages | Claim             2  
Number of students in class | Student 2,600              
Opt-out period expiration date   Jun. 20, 2011            
Number of individuals WCI file motion to compel arbitration | Members       1,062        
False Claims Act [Member]                
Loss Contingencies [Line Items]                
Number of former employees who filed complaint | Employees           4    
OIG Audit [Member]                
Loss Contingencies [Line Items]                
Potential liability related to audit | $   $ 800,000