Shareholders' Equity (Details) - USD ($) shares in Thousands	3 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Aug. 31, 2013
Share Repurchases [Line Items]
Share repurchases	$ 997,000	$ 517,000
Apollo Class A nonvoting common stock [Member]
Share Repurchases [Line Items]
Aggregate share repurchase program			$ 250,000,000
Share repurchase program, remaining authorized repurchased amount	$ 52,200,000
Share repurchases (in shares)	0	0
Share repurchases	$ 0	$ 0
Share reissuances (in shares)	329	174
Apollo Class A nonvoting common stock [Member] | Repurchases Related To Restricted Stock Units [Member]
Share Repurchases [Line Items]
Share repurchases (in shares)	115	64
Share repurchases	$ 997,000	$ 517,000