Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Detail)

v2.4.0.8
Debt - Additional Information (Detail) (USD $)
3 Months Ended 3 Months Ended
Feb. 28, 2014
Feb. 28, 2014
Minimum
Feb. 28, 2014
Maximum
Feb. 28, 2014
Libor Rate
Feb. 28, 2014
Libor Rate
Minimum
Feb. 28, 2014
Libor Rate
Maximum
Feb. 28, 2014
Base Rate
Minimum
Feb. 28, 2014
Base Rate
Maximum
Feb. 28, 2014
Revolving Credit Facility
Feb. 28, 2014
Senior Credit Facility - Term Loan
Feb. 28, 2014
Senior Credit Facility - Term Loan
Starting on September 30, 2014
Feb. 28, 2014
Senior Credit Facility - Term Loan
starting on September 30, 2015
Feb. 28, 2014
Line of Credit
Senior Credit Facility - Revolver
Feb. 28, 2014
Senior Notes
5.625% Senior Notes
Apr. 16, 2012
Senior Notes
5.625% Senior Notes
Debt Instrument [Line Items]                              
Maximum borrowing capacity                 $ 600,000,000 $ 90,000,000          
Senior credit facility expansion option, available 350,000,000                            
Debt instrument, interest rate over variable rate       1.50% 1.00% 2.50% 0.00% 1.50%              
Debt Instrument, actual interest rate 1.70%                            
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.15% 0.40%                        
Unused credit line                         596,700,000    
Quarterly installments, payable on term loan                     1,100,000 2,300,000      
Leverage ratio     3.75                        
Interest coverage ratio   3.50                          
Face amount                           $ 300,000,000 $ 300,000,000
Debt instrument, interest rate                           5.625% 5.625%