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Earnings Per Share - Reconciliation of Shares Used in Computation of Basic and Diluted Earnings Per Common Share (Detail) - shares
shares in Thousands
 3 Months Ended 9 Months Ended
May 31, 2025
May 31, 2024
May 31, 2025
May 31, 2024
Earnings Per Share Disclosure [Line Items]        
Weighted average basic common shares outstanding 31,186 31,131 31,269 31,091
Dilutive effect of restricted stock units [1] 998 890 963 904
Weighted average diluted common shares outstanding 32,184 32,021 32,272 32,456
2.875% Convertible senior notes, due 2024        
Earnings Per Share Disclosure [Line Items]        
Dilutive effect of convertible notes [2]       461
2.875% Convertible senior notes, due 2028        
Earnings Per Share Disclosure [Line Items]        
Dilutive effect of convertible notes [3]     40  
[1] Restricted stock units and restricted stock units subject to performance criteria, for which actual levels of performance above target have been achieved, are included in weighted average diluted common shares outstanding when the Company is in a net earnings position.
[2] The 2.875% Convertible notes due 2024 were retired on February 1, 2024.
[3] The dilutive effect of the 2.875% Convertible notes due 2028 was excluded for the three and nine months ended May 31, 2024 and the three months ended May 31, 2025 as the average stock price was less than the applicable conversion price and therefore was considered anti-dilutive. As these notes require cash settlement for the principal, only a premium is potentially dilutive under the "if converted" method as further discussed below.