Stock Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended				9 Months Ended
	Jan. 31, 2021	Feb. 28, 2023	Aug. 31, 2022	Feb. 28, 2022	Aug. 31, 2021	Feb. 28, 2023	Feb. 28, 2022	May 31, 2021
Stock Repurchase Programs [Line Items]
Authorization of stock repurchase program						Jan. 08, 2008
Capital to be returned to stockholders through share repurchases								$ 1,000,000
Stock repurchase program, remaining authorized repurchase, value	$ 469,700	$ 329,800				$ 329,800		$ 600,000
Stock repurchase program expiration date	May 31, 2021
Shares repurchased		143,096		171,933		446,175	305,321
Shares repurchased, value		$ 12,500	$ 25,000	$ 15,000	$ 12,500	$ 37,500	$ 27,500
Repurchase of common stock price per shares		$ 87.35		$ 87.24		$ 84.05	$ 90.07