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Debt - Additional Information (Detail) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Aug. 31, 2016 USD ($) | Aug. 31, 2016 USD ($) covenant | Aug. 31, 2015 USD ($) | Aug. 31, 2014 USD ($) | Jul. 19, 2015 USD ($) | Jun. 19, 2015 USD ($) | Apr. 16, 2012 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term Debt |  |  | $ 584,309 | $ 584,309 | $ 588,059 |  |  |  |
Cash interest payments |  |  |  | 27,200 | 24,800 | $ 21,000 |  |  |
Long-term Debt, Current Maturities |  |  | (18,750) | (18,750) | (3,750) |  |  |  |
Long-term Debt, Excluding Current Maturities |  |  | 565,559 | 565,559 | 584,309 |  |  |  |
Senior Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term Debt |  |  | 296,250 | 296,250 | 300,000 |  |  |  |
Senior Credit Facility - Revolver | Senior Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term Debt |  |  | 0 | 0 | 0 |  |  |  |
Senior Credit Facility - Term Loan | Senior Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term Debt |  |  | $ 296,250 | $ 296,250 | 300,000 |  |  |  |
5.625% Senior Notes | Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  | Jun. 15, 2022 |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  | $ 300,000
Debt instrument, interest rate |  |  | 5.625% | 5.625% |  | 5.625% |  |  | 5.625%
5.625% Senior Notes Carrying Value |  |  | $ 288,059 | $ 288,059 | $ 288,059 |  |  |  |
Minimum | 5.625% Senior Notes | Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Redemption Price As Percentage Of Principal |  |  |  |  |  |  |  |  | 100.00%
Maximum |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Leverage ratio |  |  | 3.75 | 3.75 |  |  |  |  |
Maximum | 5.625% Senior Notes | Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Redemption Price As Percentage Of Principal |  |  |  |  |  |  |  |  | 102.80%
Debt Instrument, Repurchase Amount Available |  |  |  |  |  |  |  | $ 165,000 |
Debt Instrument, Repurchase Amount |  |  |  |  |  |  | $ 11,900 |  |
Senior Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Senior credit facility expansion option, available |  |  | $ 450,000 | $ 450,000 |  |  |  |  |
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 | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument interest rate over variable rate |  |  |  | 2.00% |  |  |  |  |
Debt instrument actual interest rate |  |  | 2.50% | 2.50% |  |  |  |  |
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% |  |  |  |  |
Senior Credit Facility - Term Loan |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 300,000 | $ 300,000 |  |  |  |  |
Senior Credit Facility - Revolver |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | 600,000 | 600,000 |  |  |  |  |
Unused credit line |  |  | 592,100 | 592,100 |  |  |  |  |
Unused Borrowing Capacity Available for Borrowing |  |  | $ 180,000 | $ 180,000 |  |  |  |  |
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% |  |  |  |  |  |
Scenario, Forecast | Senior Credit Facility - Term Loan | Starting on June 30, 2016 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Quarterly installments, payable on term loan |  | $ 3,800 |  |  |  |  |  |  |
Scenario, Forecast | Senior Credit Facility - Term Loan | Starting on June 30, 2017 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Quarterly installments, payable on term loan | $ 7,500 |  |  |  |  |  |  |  |

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