Acquisitions - Additional Information (Detail) - USD ($) |
12 Months Ended | ||||||||
---|---|---|---|---|---|---|---|---|---|
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2015 |
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Business Acquisition [Line Items] | |||||||||
Acquisitions during the period | $ 0 | $ 476,885,000 | [1] | $ 17,496,000 | [2] | ||||
Decrease in goodwill | 8,179,000 | ||||||||
Unaudited pro forma consolidated fee revenue | 1,600,000,000 | 1,600,000,000 | |||||||
Unaudited pro forma consolidated net income | $ 23,000,000 | $ 75,000,000 | |||||||
Legacy Hay | |||||||||
Business Acquisition [Line Items] | |||||||||
Decrease in goodwill | $ 8,179,000 | ||||||||
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