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Fair Value Measurements (Tables)
9 Months Ended
Jan. 31, 2020
Fair Value Measurements  
Schedule of assets and liabilities measured at fair value on a recurring basis

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January 31, 

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April 30,

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2020

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2019

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(in thousands)

Interest rate swap (Level 2)

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$

18,982

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$

5,613

Stock appreciation rights (Level 3)

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23,613

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23,458

Deferred compensation (Level 3)

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1,628

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1,695

Noncontrolling interest holders (Level 3)

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8,139

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12,498

Contingent consideration (Level 3)

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13,067

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12,354