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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
 12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Earnings Per Share Disclosure [Line Items]      
Weighted average basic common shares outstanding [1] 31,983 32,569 32,648
Dilutive effect of restricted stock units [2] 992 1,062 1,017
Weighted average diluted common shares outstanding 33,799 33,631 33,665
2.875% Convertible senior notes, due 2024      
Earnings Per Share Disclosure [Line Items]      
Dilutive effect of convertible notes [3],[4] 824    
[1] Restricted stock grants and restricted stock units that are considered participating securities, including some grants subject to certain performance criteria, are included in weighted average basic common shares outstanding when the Company is in a net earnings position. No participating securities are included in basic common shares outstanding for the year ended August 31, 2023.
[2] Restricted stock units that are not considered participating securities 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.
[3] The dilutive effect of the 2.875% Convertible notes due 2024 was excluded for the year ended August 31, 2022 as they were considered anti-dilutive under the “if converted” method as further discussed below.
[4] The dilutive effect of the 2.875% Convertible notes, due 2024 was excluded for the year ended August 31, 2021 as the average stock price was less than the applicable conversion price and therefore was anti-dilutive under previous applicable guidance. See further discussion below.