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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 435,950	$ 455,054	$ 439,457	$ 454,872
Net other comprehensive income	819	1,180	1,409	3,275
Ending Balance	432,368	$ 454,343	432,368	$ 454,343
Foreign currency translation income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	3,743		3,153
Other comprehensive income, net of tax	819		1,409
Net other comprehensive income	819		1,409
Ending Balance	$ 4,562		$ 4,562

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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