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Recent Accounting Standards (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Apr. 30, 2019
Recently Adopted Accounting Standards [Abstract]
Operating lease liabilities at adoption	$ 184,683
ROU assets at adoption	$ 147,370	$ 0
ASU 2016-02 [Member]
Recently Adopted Accounting Standards [Abstract]
Operating lease liabilities at adoption		178,000
ROU assets at adoption		$ 142,000

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- References

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

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-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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