XML 24 R50.htm IDEA: XBRL DOCUMENT v3.3.0.814
Restructuring Charges - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2015
Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]      
Accrual for severance and related charges $ 6.6 $ 6.6 $ 4.0
Long term amount 3.0 3.0 $ 1.2
Accrued retention bonuses 1.3 $ 1.3  
Amount recorded ratably over the period retained 0.7    
Lease expiration teach out campuses   2023  
Charges related to remaining obligations 10.9 $ 13.1  
Minimum [Member]      
Restructuring Cost and Reserve [Line Items]      
Gross remaining lease obligations 20.0 20.0  
Maximum [Member]      
Restructuring Cost and Reserve [Line Items]      
Gross remaining lease obligations $ 25.0 $ 25.0