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Retirement Plans, Amounts in Accumulated Other Comprehensive Loss to Be Recognized During Next Fiscal Year (Details) $ in Thousands	Apr. 30, 2018 USD ($)
Amounts in Accumulated Other Comprehensive Loss to be recognized in next fiscal year [Abstract]
Actuarial Loss	$ 5,903
Prior Service Cost	(93)
Total	5,810
U.S. [Member]
Amounts in Accumulated Other Comprehensive Loss to be recognized in next fiscal year [Abstract]
Actuarial Loss	1,905
Prior Service Cost	(154)
Total	1,751
Non-U.S. [Member]
Amounts in Accumulated Other Comprehensive Loss to be recognized in next fiscal year [Abstract]
Actuarial Loss	3,998
Prior Service Cost	61
Total	$ 4,059

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- References

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- Definition

Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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