Stock Appreciation Rights, Deferred Compensation and Redeemable Noncontrolling Interests (Tables)

6 Months Ended

Oct. 31, 2016

Stock appreciation rights

Equity based compensation arrangements

Summary of changes to liability for equity based compensation arrangements

	As of
	October 31, 2016
Stock appreciation rights as of April 30, 2016 (at fair value)	$	20,533
Amounts redeemed		(28)
Change in fair value		(236)
Stock appreciation rights as of October 31, 2016 (at fair value)	$	20,269

Deferred compensation

Equity based compensation arrangements

Summary of changes to liability for equity based compensation arrangements

	As of
	October 31, 2016
Deferred compensation as of April 30, 2016 (at fair value)	$	3,270
Amounts redeemed		—
Change in fair value		377
Deferred compensation as of October 31, 2016 (at fair value)	$	3,647

Noncontrolling interest awards

Equity based compensation arrangements

Summary of changes to liability for equity based compensation arrangements

	As of
	October 31, 2016
Non‑controlling interests as of April 30, 2016 (at fair value)	$	26,585
Amounts redeemed		(5,354)
Change in fair value		2,446
Non-controlling interests as of October 31, 2016 (at fair value)	$	23,677