Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Stock Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	Feb. 28, 2019	May 31, 2021
Stock Repurchase Programs [Line Items]
Authorization of stock repurchase program				Jan. 08, 2008
Shares repurchased	1,570,647			2,819,045
Shares repurchased, value	$ 91,230	$ 74,998	$ 6,994	$ 173,200
Repurchase of common stock price per shares	$ 58.08			$ 61.45
Scenario Forecast
Stock Repurchase Programs [Line Items]
Capital to be returned to stockholders through dividends and share repurchases					$ 1,500,000