Stock Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2021	Aug. 31, 2021	Aug. 31, 2020	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			$ 600,000
Stock repurchase program expiration date	May 31, 2021
Shares repurchased		133,388	0
Shares repurchased, value		$ 12,500
Repurchase of common stock price per shares		$ 93.71
Maximum
Stock Repurchase Programs [Line Items]
Stock repurchase program, remaining authorized repurchase, value		$ 407,300