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Income Taxes and Other Taxes (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 28, 2019 USD ($) | Feb. 28, 2019 USD ($)
Income Tax And Non Income Tax Disclosure [Abstract] |  |
Effective income tax rate (percentage) | 39.40% | 60.30%
Loss Contingencies [Line Items] |  |
Provisional tax benefit |  | $ 500,000.0
Wisconsin | State Sales Tax Assessment |  |
Loss Contingencies [Line Items] |  |
Sales payable | $ 5,400,000 | $ 5,400,000

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