Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Open Tax Years and Ongoing Tax Examinations in Major Jurisdictions (Detail)

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Income Taxes - Summary of Open Tax Years and Ongoing Tax Examinations in Major Jurisdictions (Detail)
 12 Months Ended
Nov. 30, 2014
Nov. 30, 2013
United States - Federal Income Tax [Member]    
Income Tax Contingency [Line Items]    
Examinations in Process N/A  
United States - Federal Income Tax [Member] | Earliest Tax Year [Member]    
Income Tax Contingency [Line Items]    
Open Tax Years 2010  
United States - Federal Income Tax [Member] | Latest Tax Year [Member]    
Income Tax Contingency [Line Items]    
Open Tax Years   2013
United States - Various States [Member]    
Income Tax Contingency [Line Items]    
Examinations in Process N/A  
United States - Various States [Member] | Earliest Tax Year [Member]    
Income Tax Contingency [Line Items]    
Open Tax Years 2009  
United States - Various States [Member] | Latest Tax Year [Member]    
Income Tax Contingency [Line Items]    
Open Tax Years   2013