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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 6 Months Ended
Feb. 28, 2025
Feb. 29, 2024
Feb. 28, 2025
Feb. 29, 2024
Earnings Per Share Disclosure [Line Items]        
Weighted average basic common shares outstanding 31,376 31,117 31,311 31,071
Dilutive effect of restricted stock units [1] 959 890 946 911
Weighted average diluted common shares outstanding 33,228 32,570 32,745 32,676
2.875% Convertible senior notes, due 2024        
Earnings Per Share Disclosure [Line Items]        
Dilutive effect of convertible notes [2]   563   694
2.875% Convertible senior notes, due 2028        
Earnings Per Share Disclosure [Line Items]        
Dilutive effect of convertible notes [3] 893   488  
[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 dilutive effect of the 2.875% Convertible notes due 2024 was included for the three and six months ended February 29, 2024 under the “if converted” method as further discussed below. These notes were retired on February 1, 2024.
[3] The dilutive effect of the 2.875% Convertible notes due 2028 was excluded for the three and six months ended February 29, 2024 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.