Annual report pursuant to Section 13 and 15(d)

Debt - Additional Information (Detail)

v3.3.0.814
Debt - Additional Information (Detail)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Aug. 31, 2015
USD ($)
Aug. 31, 2015
USD ($)
covenant
Aug. 31, 2014
USD ($)
Aug. 31, 2013
USD ($)
Jul. 19, 2015
USD ($)
Jun. 19, 2015
USD ($)
Apr. 16, 2012
USD ($)
Debt Instrument [Line Items]                  
Cash interest payments       $ 24.8 $ 21.0 $ 21.0      
5.625% Senior Notes | Senior Notes                  
Debt Instrument [Line Items]                  
Debt Instrument, Maturity Date       Jun. 15, 2022          
Face amount                 $ 300.0
Debt instrument, interest rate     5.625% 5.625%   5.625%     5.625%
Minimum | 5.625% Senior Notes | Senior Notes                  
Debt Instrument [Line Items]                  
Debt Redemption Price As Percentage Of Principal                 100.00%
Maximum | 5.625% Senior Notes | Senior Notes                  
Debt Instrument [Line Items]                  
Debt Redemption Price As Percentage Of Principal                 102.80%
Debt Instrument, Call Date, Earliest     Jun. 19, 2015            
Debt Instrument, Repurchase Amount Available               $ 165.0  
Debt Instrument, Repurchase Amount             $ 11.9    
Senior Credit Facility - Term Loan                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity     $ 300.0 $ 300.0          
Senior Credit Facility - Revolver                  
Debt Instrument [Line Items]                  
Debt Instrument, Maturity Date       May 08, 2020          
Maximum borrowing capacity     600.0 $ 600.0          
Unused credit line     589.0 589.0          
Unused Borrowing Capacity Available for Borrowing     $ 176.0 176.0          
Senior Credit Facility - Revolver | Minimum                  
Debt Instrument [Line Items]                  
Percentage of non-use fee, annually     0.15%            
Senior Credit Facility - Revolver | Maximum                  
Debt Instrument [Line Items]                  
Percentage of non-use fee, annually     0.35%            
Senior Credit Facility                  
Debt Instrument [Line Items]                  
Senior credit facility expansion option, available     $ 450.0 $ 450.0          
Number of financial covenants | covenant       2          
Senior Credit Facility | Minimum                  
Debt Instrument [Line Items]                  
Fixed charge coverage ratio     3.50 3.50          
Senior Credit Facility | Maximum                  
Debt Instrument [Line Items]                  
Leverage ratio     3.75 3.75          
Senior Credit Facility | LIBOR                  
Debt Instrument [Line Items]                  
Debt instrument interest rate over variable rate       1.75%          
Debt instrument actual interest rate     2.00% 2.00%          
Senior Credit Facility | LIBOR | Minimum                  
Debt Instrument [Line Items]                  
Debt instrument interest rate over variable rate       1.00%          
Senior Credit Facility | LIBOR | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument interest rate over variable rate       2.25%          
Senior Credit Facility | Base Rate | Minimum                  
Debt Instrument [Line Items]                  
Debt instrument interest rate over variable rate       0.00%          
Senior Credit Facility | Base Rate | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument interest rate over variable rate       1.25%          
Scenario, Forecast | Senior Credit Facility - Term Loan | Starting on June 30, 2016                  
Debt Instrument [Line Items]                  
Quarterly installments, payable on term loan   $ 3.8              
Scenario, Forecast | Senior Credit Facility - Term Loan | Starting on June 30, 2017                  
Debt Instrument [Line Items]                  
Quarterly installments, payable on term loan $ 7.5