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Shared-Based Compensation (Tables) | 12 Months Ended
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Aug. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Schedule Of Share-Based Compensation Expense |
|  | For the years ended August 31, |
($ in thousands) |  | 2018 |  |  | 2017 |  |  | 2016 |
Share-based compensation expense included in cost of operating revenues |  | $ | 113 |  |  | $ | 231 |  |  | $ | 207 |
Research and development |  |  | 150 |  |  |  | 162 |  |  |  | 140 |
Sales and marketing |  |  | 461 |  |  |  | 397 |  |  |  | 455 |
General and administrative |  |  | 3,169 |  |  |  | 2,807 |  |  |  | 2,258 |
Share-based compensation expense included in operating expenses |  |  | 3,780 |  |  |  | 3,366 |  |  |  | 2,853 |
Total share-based compensation expense |  |  | 3,893 |  |  |  | 3,597 |  |  |  | 3,060 |
Tax benefit |  |  | (1,090 | ) |  |  | (1,338 | ) |  |  | (1,138 | )
Share-based compensation expense, net of tax |  | $ | 2,803 |  |  | $ | 2,259 |  |  | $ | 1,922 |
Schedule Of Assumptions Used |
|  | Grant year |
|  | Fiscal 2018 |  |  | Fiscal 2017 |
Risk-free interest rate |  |  | 2.2 | % |  |  | 1.5 | %
Dividend yield |  |  | 1.3 | % |  |  | 1.5 | %
Expected life (years) |  |  | 7 |  |  |  | 7 |
Volatility |  |  | 33.9 | % |  |  | 36.5 | %
Weighted average grant-date fair value of options granted |  | $ | 30.72 |  |  | $ | 26.25 |
Summary Of Stock Option Activity |
|  | Number of stock options |  |  | Average exercise price |  |  | Average remaining contractual term (years) |  |  | Aggregate intrinsic value (thousands) |
Stock options outstanding at August 31, 2016 |  |  | 127,286 |  |  | $ | 71.24 |  |  |  | 7.4 |  |  | $ | 521 |
Granted |  |  | 47,223 |  |  | $ | 78.23 |  |  |  |  |  |  |  |  |
Exercised |  |  | (43,556 | ) |  | $ | 69.33 |  |  |  |  |  |  | $ | 681 |
Forfeited / cancelled |  |  | (8,434 | ) |  | $ | 73.90 |  |  |  |  |  |  |  |  |
Stock options outstanding at August 31, 2017 |  |  | 122,519 |  |  | $ | 74.43 |  |  |  | 7.5 |  |  | $ | 1,487 |
Granted |  |  | 46,306 |  |  | $ | 91.52 |  |  |  |  |  |  |  |  |
Exercised |  |  | (37,651 | ) |  | $ | 74.02 |  |  |  |  |  |  | $ | 538 |
Forfeited / cancelled |  |  | (54,371 | ) |  | $ | 78.49 |  |  |  |  |  |  |  |  |
Stock options outstanding at August 31, 2018 |  |  | 76,803 |  |  | $ | 82.06 |  |  |  | 7.7 |  |  | $ | 1,053 |
Exercisable at August 31, 2016 |  |  | 57,250 |  |  | $ | 68.57 |  |  |  | 6.1 |  |  | $ | 362 |
Exercisable at August 31, 2017 |  |  | 36,348 |  |  | $ | 71.37 |  |  |  | 5.8 |  |  | $ | 553 |
Exercisable at August 31, 2018 |  |  | 25,469 |  |  | $ | 72.70 |  |  |  | 5.5 |  |  | $ | 587 |
Summary Of Share Based Compensation Additional Information |
|  | For the years ended August 31, |
($ in thousands) |  | 2018 |  |  | 2017 |  |  | 2016 |
Intrinsic value of stock options exercised |  | $ | 538 |  |  | $ | 681 |  |  | $ | 181 |
Cash received from stock option exercises |  | $ | 2,788 |  |  | $ | 3,020 |  |  | $ | 113 |
Tax benefit realized from stock option exercises |  | $ | 151 |  |  | $ | 254 |  |  | $ | 67 |
Aggregate grant-date fair value of stock options vested |  | $ | 31.37 |  |  | $ | 35.79 |  |  | $ | 37.70 |
Summary Of Restricted Stock Units |
|  | Number of restricted stock units |  |  | Weighted average grant- date fair value |
Restricted stock units outstanding at August 31, 2016 |  |  | 67,054 |  |  | $ | 69.11 |
Granted |  |  | 44,647 |  |  |  | 74.75 |
Vested |  |  | (34,312 | ) |  |  | 69.89 |
Forfeited / Cancelled |  |  | (8,366 | ) |  |  | 70.51 |
Restricted stock units outstanding at August 31, 2017 |  |  | 69,023 |  |  | $ | 72.25 |
Granted |  |  | 79,550 |  |  |  | 87.80 |
Vested |  |  | (34,857 | ) |  |  | 72.82 |
Forfeited / Cancelled |  |  | (23,107 | ) |  |  | 76.99 |
Restricted stock units outstanding at August 31, 2018 |  |  | 90,609 |  |  | $ | 84.38 |
Schedule Of Performance Stock Status |
|  | Number of performance stock units |  |  | Weighted average grant- date fair value |
Performance stock units outstanding at August 31, 2016 |  |  | 38,148 |  |  | $ | 72.20 |
Granted |  |  | 15,902 |  |  |  | 74.80 |
Forfeited / cancelled |  |  | (15,361 | ) |  |  | 74.10 |
Performance stock units outstanding at August 31, 2017 |  |  | 38,689 |  |  | $ | 72.52 |
Granted |  |  | 15,524 |  |  |  | 88.02 |
Forfeited / cancelled |  |  | (34,261 | ) |  |  | 74.61 |
Performance stock units outstanding at August 31, 2018 |  |  | 19,952 |  |  |  | 80.99 |

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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure for share-based compensation plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding performance-based awards that are fully vested and expected to vest. Includes, but is not limited to, unvested awards for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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