The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

No definition available.

Debt - Additional Information (Details) $ in Millions			3 Months Ended	9 Months Ended
Debt - Additional Information (Details) $ in Millions	Jun. 15, 2020 USD ($)	Apr. 16, 2012 USD ($)	May 31, 2020 USD ($)	May 31, 2020 USD ($)	Feb. 28, 2019 USD ($)
Debt Instrument [Line Items]
Document Period End Date				May 31, 2020
Debt Issuance Costs, Noncurrent, Net			$ 0.6	$ 0.6
Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			400.0	400.0	$ 300.0
Senior Credit Facility - Term Loan
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			200.0	200.0
Line of Credit \| Senior Credit Facility - Revolver
Debt Instrument [Line Items]
Unused credit line Available for Borrowing, Amount			$ 394.9	$ 394.9
Senior Notes \| 5.625% Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 300.0
Debt instrument, interest rate		5.625%
Debt Instrument, Maturity Date			Jun. 15, 2022
Minimum
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.15%
Interest coverage ratio			3.0	3.0
Minimum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.125%
Minimum \| Base Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.00%
Minimum \| Senior Notes \| 5.625% Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage		100.00%
Maximum
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.30%
Leverage ratio			3.75	3.75
Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.00%
Maximum \| Base Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.25%
Maximum \| Senior Notes \| 5.625% Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage		100.90%
Accordion [Domain]
Debt Instrument [Line Items]
Senior credit facility expansion option, available			$ 300.0	$ 300.0
Incremental Term Loan [Domain]
Debt Instrument [Line Items]
Senior credit facility expansion option, available			$ 200.0	$ 200.0
Subsequent Event [Member] \| Line of Credit \| Senior Credit Facility - Revolver
Debt Instrument [Line Items]
Proceeds from Lines of Credit	$ 295.0