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v3.20.2

Debt and Lines of Credit (Details) |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 16, 2019 USD ($) | Jun. 29, 2018 USD ($) installment | May 31, 2020 USD ($) | May 31, 2019 USD ($) | May 31, 2020 USD ($) | May 31, 2019 USD ($) | Aug. 31, 2019 USD ($)
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Borrowings reflected within Long-term debt on Consolidated Balance Sheets |  |  | $ 385,800,000 |  | $ 385,800,000 |  | $ 347,500,000
Interest Revenue (Expense), Net [Abstract] |  |  |  |  |  |  |
Interest expense |  |  | 6,100,000 | $ 9,100,000 | 21,900,000 | $ 27,400,000 |
Interest income |  |  | (700,000) | (800,000) | (2,500,000) | (1,800,000) |
Interest expense, net |  |  | 5,400,000 | $ 8,300,000 | 19,400,000 | $ 25,600,000 |
Credit facility |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Executed revolving credit facility |  | $ 800,000,000.0 |  |  |  |  |
Minimum interest coverage ratio |  | 2.50 |  |  |  |  |
Maximum leverage ratio |  | 3.50 |  |  |  |  |
Outstanding letters of credit |  |  | 8,100,000 |  | 8,100,000 |  |
Credit facility | Minimum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Facility fee (percent) |  | 0.125% |  |  |  |  |
Credit facility | Maximum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Facility fee (percent) |  | 0.25% |  |  |  |  |
Credit facility | New Revolving Credit Facility |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Executed revolving credit facility |  | $ 400,000,000.0 |  |  |  |  |
Revolving credit facility term |  | 5 years |  |  |  |  |
Borrowings outstanding under current Revolving Credit Facility |  |  | 0 |  | 0 |  | 0
Additional borrowing capacity under revolving credit facility |  |  | 396,200,000 |  | 396,200,000 |  |
Unsecured term loan | Unsecured Delayed Draw Term Loan |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Term loan facility |  | $ 400,000,000.0 |  |  |  |  |
Borrowings outstanding under Term Loan Facility |  |  | 397,500,000 |  | 397,500,000 |  | 0
Borrowings reflected within Long-term debt on Consolidated Balance Sheets |  |  | 380,000,000.0 |  | 380,000,000.0 |  |
Number of separate installments allowed during borrowing period | installment |  | 4 |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Debt outstanding |  |  | 397,500,000 |  | 397,500,000 |  | $ 0
Letters of Credit | New Revolving Credit Facility |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Outstanding letters of credit |  |  | 3,800,000 |  | 3,800,000 |  |
Senior unsecured public notes | Senior Unsecured Notes Maturing December 2019 |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Senior unsecured notes repaid | $ 350,000,000.0 |  |  |  |  |  |
Industrial revenue bond | Industrial Revenue Bond Maturing in 2021 |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Borrowings outstanding under Term Loan Facility |  |  | 4,000,000.0 |  | 4,000,000.0 |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Debt outstanding |  |  | 4,000,000.0 |  | 4,000,000.0 |  |
Bank loans | 2016 Fixed-rate Bank Loans |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Borrowings outstanding under Term Loan Facility |  |  | 2,100,000 |  | 2,100,000 |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Debt outstanding |  |  | $ 2,100,000 |  | $ 2,100,000 |  |
Eurocurrency Rate | Credit facility | New Revolving Credit Facility | Minimum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Applicable margins based on company's leverage ratio, percentage |  | 1.00% |  |  |  |  |
Eurocurrency Rate | Credit facility | New Revolving Credit Facility | Maximum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Applicable margins based on company's leverage ratio, percentage |  | 1.375% |  |  |  |  |
Eurocurrency Rate | Unsecured term loan | Unsecured Delayed Draw Term Loan | Minimum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Applicable margins based on company's leverage ratio, percentage |  | 0.875% |  |  |  |  |
Eurocurrency Rate | Unsecured term loan | Unsecured Delayed Draw Term Loan | Maximum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Applicable margins based on company's leverage ratio, percentage |  | 1.25% |  |  |  |  |
Base rate | Credit facility | New Revolving Credit Facility | Minimum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Applicable margins based on company's leverage ratio, percentage |  | 0.00% |  |  |  |  |
Base rate | Credit facility | New Revolving Credit Facility | Maximum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Applicable margins based on company's leverage ratio, percentage |  | 0.375% |  |  |  |  |
Base rate | Unsecured term loan | Unsecured Delayed Draw Term Loan | Minimum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Applicable margins based on company's leverage ratio, percentage |  | 0.00% |  |  |  |  |
Base rate | Unsecured term loan | Unsecured Delayed Draw Term Loan | Maximum |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Applicable margins based on company's leverage ratio, percentage |  | 0.25% |  |  |  |  |
Year one | Unsecured term loan | Unsecured Delayed Draw Term Loan |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Quarterly payment (percent) |  | 2.50% |  |  |  |  |
Year two | Unsecured term loan | Unsecured Delayed Draw Term Loan |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Quarterly payment (percent) |  | 2.50% |  |  |  |  |
Year three | Unsecured term loan | Unsecured Delayed Draw Term Loan |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Quarterly payment (percent) |  | 5.00% |  |  |  |  |
Year four | Unsecured term loan | Unsecured Delayed Draw Term Loan |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Quarterly payment (percent) |  | 5.00% |  |  |  |  |
Year five and after | Unsecured term loan | Unsecured Delayed Draw Term Loan |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |
Quarterly payment (percent) |  | 7.50% |  |  |  |  |

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