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Stock-based Compensation (Tables) | 12 Months Ended
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Aug. 31, 2021
Stock-based Compensation [Abstract] |
Schedule Of Stock-based Compensation Expense |
| Fiscal Year Ended August 31,
| 2021 |  | 2020 |  | 2019
RSU compensation expense | $ | 3,656 |  | $ | 3,325 |  | $ | 2,876
MSU compensation expense |  | 2,294 |  |  | 2,033 |  |  | 1,570
PSU compensation expense (1) |  | 3,605 |  |  | - |  |  | -
Total | $ | 9,555 |  | $ | 5,358 |  | $ | 4,446
(1)PSU awards, similar to DPU awards that were replaced by PSUs in fiscal year 2021, contain performance conditions for which accrual of expense is based on the probable outcome of the performance conditions. Vesting of DPUs related to the measurement years of both fiscal year 2020 and 2019 was deemed not probable at the end of each fiscal year. DPUs were then discontinued by the Company prior fiscal year 2021. PSUs pertaining to the measurement year of fiscal year 2021 vested at 100% since the performance conditions were fully achieved.
Schedule Of Restricted Stock Units Activity |
|  |  | Weighted-Average |  |
|  |  | Grant Date |  |
| Number of |  | Fair Value |  | Aggregate
Restricted Stock Units | Shares |  | Per Share |  | Intrinsic Value
Outstanding at August 31, 2020 |  | 86,154 |  | $ | 106.20 |  |  |
Granted |  | 17,244 |  | $ | 208.29 |  |  |
Converted to common shares |  | (33,996) |  | $ | 104.94 |  |  |
Forfeited |  | (401) |  | $ | 183.37 |  |  |
Outstanding at August 31, 2021 |  | 69,001 |  | $ | 131.88 |  | $ | 16,535
Vested at August 31, 2021 |  | 44,701 |  | $ | 103.07 |  | $ | 10,712
Schedule Of Valuation Assumptions |
| Fiscal Year Ended August 31,
| 2021 |  | 2020 |  | 2019
Expected volatility |  | 28.5% |  |  | 21.4% |  |  | 19.6%
Risk-free interest rate |  | 0.2% |  |  | 1.4% |  |  | 3.0%
Expected dividend yield |  | 0.0% |  |  | 0.0% |  |  | 0.0%
Schedule Of Market Share Units Activity |
|  |  | Weighted-Average |  |
|  |  | Grant Date |  |
| Number of |  | Fair Value |  | Aggregate
Market Share Units | Shares |  | Per Share |  | Intrinsic Value
Outstanding at August 31, 2020 |  | 39,118 |  | $ | 164.14 |  |  |
Granted |  | 13,701 |  | $ | 184.96 |  |  |
Performance factor adjustments |  | 11,105 |  | $ | 107.05 |  |  |
Converted to common shares |  | (25,289) |  | $ | 104.64 |  |  |
Forfeited |  | (2,041) |  | $ | 180.13 |  |  |
Outstanding at August 31, 2021 (1) |  | 36,594 |  | $ | 194.83 |  | $ | 8,769
(1)This figure represents the total number of shares underlying MSU grants assuming achievement of the target number of shares at 100%. As the ultimate number of shares that vest could be as high as 200% of the target, the Company may be required to issue additional shares to satisfy outstanding MSU award grants.
Schedule Of Performance Share Units |
|  |  |  | Weighted-Average |  |  |
|  |  | Grant Date |  |
| Number of |  | Fair Value |  | Aggregate
Performance Share Units | Shares |  | Per Share |  | Intrinsic Value
Outstanding at August 31, 2020 |  | - |  | $ | - |  |  |
Granted |  | 19,468 |  | $ | 197.51 |  |  |
Performance factor adjustments |  | - |  | $ | - |  |  |
Converted to common shares |  | - |  | $ | - |  |  |
Forfeited |  | (1,216) |  | $ | 197.51 |  |  |
Outstanding at August 31, 2021 (1) |  | 18,252 |  | $ | 197.51 |  | $ | 4,373
(1)PSUs pertaining to the measurement year of fiscal year 2021 vested at 100% since performance conditions were fully achieved at an attainment level of 100%, which was certified subsequent to August 31, 2021 by the Company’s compensation committee.

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