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Restructuring and Related Charges, Activity for Restructuring and Reinvestment Program Liability (Details) $ in Thousands	3 Months Ended
	Jul. 31, 2019 USD ($)
Business Optimization Program [Member]
Activity for Restructuring and Related Charges Liability [Roll Forward]
Restructuring liability, beginning of period	$ 0
Charges	10,709
Payments	(1,337)
Foreign translation	(33)
Restructuring liability, end of period	9,339
Business Optimization Program [Member] | Severance and Termination Benefits [Member]
Activity for Restructuring and Related Charges Liability [Roll Forward]
Restructuring liability, beginning of period	0
Charges	10,709
Payments	(1,337)
Foreign translation	(33)
Restructuring liability, end of period	9,339
Restructuring and Reinvestment Program [Member]
Activity for Restructuring and Related Charges Liability [Roll Forward]
Restructuring liability, beginning of period	7,734
Charges	(350)
Payments	(1,477)
Adoption of new lease standard	(2,258)	[1]
Foreign translation & other adjustments	(47)
Restructuring liability, end of period	3,602
Restructuring and Reinvestment Program [Member] | Severance and Termination Benefits [Member]
Activity for Restructuring and Related Charges Liability [Roll Forward]
Restructuring liability, beginning of period	4,887
Charges	(350)
Payments	(1,477)
Adoption of new lease standard	0	[1]
Foreign translation & other adjustments	29
Restructuring liability, end of period	3,089
Restructuring and Reinvestment Program [Member] | Consulting and Contract Termination Costs [Member]
Activity for Restructuring and Related Charges Liability [Roll Forward]
Restructuring liability, beginning of period	303
Charges	0
Payments	0
Adoption of new lease standard	0	[1]
Foreign translation & other adjustments	0
Restructuring liability, end of period	303
Restructuring and Reinvestment Program [Member] | Other Activities [Member]
Activity for Restructuring and Related Charges Liability [Roll Forward]
Restructuring liability, beginning of period	2,544
Charges	0
Payments	0
Adoption of new lease standard	(2,258)	[1]
Foreign translation & other adjustments	(76)
Restructuring liability, end of period	210
Restructuring and Reinvestment Program [Member] | Other Activities [Member] | Other Accrued Liabilities [Member]
Activity for Restructuring and Related Charges Liability [Roll Forward]
Restructuring liability, end of period	$ 200
[1] Refer to Note 2, “Recent Accounting Standards,” and Note 5, “Operating Leases” for more information related to the adoption of the new lease standard.

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- Definition

Amount of impact of adoption new lease standard associated with exit or disposal activities pursuant to an authorized plan.

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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