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Goodwill and Intangible Assets, Goodwill (Details) $ in Thousands | 9 Months Ended
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Jan. 31, 2018 USD ($)
Goodwill [Roll Forward] |
Beginning balance | $ 982,101
Foreign translation adjustment | 46,294
Ending balance | 1,028,395
Research [Member] |
Goodwill [Roll Forward] |
Beginning balance | 437,928
Foreign translation adjustment | 31,751
Ending balance | $ 469,679
% by which estimated fair value exceeds carrying value | 504.90%
Publishing [Member] |
Goodwill [Roll Forward] |
Beginning balance | $ 283,192
Foreign translation adjustment | 14,543
Ending balance | $ 297,735
% by which estimated fair value exceeds carrying value | 151.30%
Solutions [Member] |
Goodwill [Roll Forward] |
Beginning balance | $ 260,981
Foreign translation adjustment | 0
Ending balance | $ 260,981
% by which estimated fair value exceeds carrying value | 34.00%

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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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. + References No definition available. + Details
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- Definition Percentage of fair value of reporting unit in excess of carrying amount. + References No definition available. + Details
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- Details
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- Details
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