Consolidated Condensed Statements of Income (Parenthetical) $ in Thousands	9 Months Ended
Feb. 29, 2020 USD ($)
Income Statement [Abstract]
Loss from discontinued operations, tax expense (benefit)	$ (107)

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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+ Details