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Shared-Based Compensation (Tables) | 12 Months Ended
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Aug. 31, 2016
Share-Based Compensation [Abstract] |
Schedule Of Share-Based Compensation Expense |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  | For the years ended August 31,
﻿($ in thousands) |  | 2016 |  | 2015 |  | 2014
﻿Share-based compensation expense included in cost of |  |  |  |  |  |  |  |  |
﻿ operating revenues |  | $ | 207 |  | $ | 161 |  | $ | 205
﻿ |  |  |  |  |  |  |  |  |
﻿Research and development |  |  | 140 |  |  | 121 |  |  | 135
﻿Sales and marketing |  |  | 455 |  |  | 523 |  |  | 570
﻿General and administrative |  |  | 2,258 |  |  | 2,527 |  |  | 3,297
﻿Share-based compensation expense included in |  |  |  |  |  |  |  |  |
﻿ operating expenses |  |  | 2,853 |  |  | 3,171 |  |  | 4,002
﻿Total share-based compensation expense |  |  | 3,060 |  |  | 3,332 |  |  | 4,207
﻿Tax benefit |  |  | (1,138) |  |  | (1,240) |  |  | (1,594)
﻿Share-based compensation expense, net of tax |  | $ | 1,922 |  | $ | 2,092 |  | $ | 2,613
﻿ |  |  |  |  |  |  |  |  |
﻿
Schedule Of Assumptions Used |
﻿ |  |  |  |  |  |
﻿ |  | Grant year
﻿ |  | Fiscal 2016 |  | Fiscal 2015
﻿Risk-free interest rate |  |  | 1.8% |  |  | 2.0%
﻿Dividend yield |  |  | 1.7% |  |  | 1.3%
﻿Expected life (years) |  |  | 7 |  |  | 7
﻿Volatility |  |  | 46.3% |  |  | 53.6%
﻿Weighted average grant-date fair value of options granted |  | $ | 27.88 |  | $ | 40.66
﻿ |  |  |  |  |  |
﻿
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, 2014 |  | 86,623 |  | $ | 63.80 |  | 7.3 |  | $ | 1,211
﻿ Granted |  | 25,332 |  | $ | 83.53 |  |  |  |  |
﻿ Exercised |  | (9,859) |  | $ | 39.99 |  |  |  | $ | 425
﻿ Forfeited / cancelled |  | (5,720) |  | $ | 76.91 |  |  |  |  |
﻿Stock options outstanding at August 31, 2015 |  | 96,376 |  | $ | 70.65 |  | 7.3 |  | $ | 710
﻿ Granted |  | 39,999 |  | $ | 67.68 |  |  |  |  |
﻿ Exercised |  | (4,456) |  | $ | 25.47 |  |  |  | $ | 181
﻿ Forfeited / cancelled |  | (4,633) |  | $ | 72.14 |  |  |  |  |
﻿Stock options outstanding at August 31, 2016 |  | 127,286 |  | $ | 71.24 |  | 7.4 |  | $ | 521
﻿ |  |  |  |  |  |  |  |  |  |
﻿Exercisable at August 31, 2014 |  | 30,130 |  | $ | 49.55 |  | 5.3 |  | $ | 851
﻿Exercisable at August 31, 2015 |  | 39,449 |  | $ | 61.47 |  | 6.1 |  | $ | 583
﻿Exercisable at August 31, 2016 |  | 57,250 |  | $ | 68.57 |  | 6.1 |  | $ | 362
﻿
Summary Of Share Based Compensation Additional Information |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  | For the years ended August 31,
﻿($ in thousands) |  | 2016 |  | 2015 |  | 2014
﻿Intrinsic value of stock options exercised |  | $ | 181 |  | $ | 425 |  | $ | 853
﻿Cash received from stock option exercises |  | $ | 113 |  | $ | 394 |  | $ | 455
﻿Tax benefit realized from stock option exercises |  | $ | 67 |  | $ | 158 |  | $ | 317
﻿Aggregate grant-date fair value of stock options vested |  | $ | 37.70 |  | $ | 36.71 |  | $ | 34.89
﻿ |  |  |  |  |  |  |  |  |
﻿
Summary Of Restricted Stock Units |
﻿ |  |  |  |  |  |
﻿ |  | Number of restricted stock units |  | Weighted average grant-date fair value
﻿Restricted stock units outstanding at August 31, 2014 |  |  | 59,153 |  | $ | 73.04
﻿ Granted |  |  | 34,291 |  |  | 80.94
﻿ Vested |  |  | (32,349) |  |  | 72.28
﻿ Forfeited / Cancelled |  |  | (4,123) |  |  | 77.55
﻿Restricted stock units outstanding at August 31, 2015 |  |  | 56,972 |  | $ | 78.54
﻿ Granted |  |  | 48,022 |  |  | 64.36
﻿ Vested |  |  | (30,634) |  |  | 78.68
﻿ Forfeited / Cancelled |  |  | (7,306) |  |  | 70.41
﻿Restricted stock units outstanding at August 31, 2016 |  |  | 67,054 |  | $ | 69.11
﻿
Schedule Of Performance Stock Status |
﻿ |  |  |  |  |  |
﻿ |  | Number of performance stock units |  | Weighted average grant-date fair value
﻿Performance stock units outstanding at August 31, 2014 |  |  | 40,752 |  | $ | 67.81
﻿ Granted |  |  | 12,328 |  |  | 80.33
﻿ Vested |  |  | (15,786) |  |  | 57.09
﻿ Forfeited / cancelled |  |  | (3,438) |  |  | 76.44
﻿Performance stock units outstanding at August 31, 2015 |  |  | 33,856 |  | $ | 76.50
﻿ Granted |  |  | 16,466 |  |  | 64.37
﻿ Vested |  |  | (7,665) |  |  | 74.31
﻿ Forfeited / cancelled |  |  | (4,509) |  |  | 72.28
﻿Performance stock units outstanding at August 31, 2016 |  |  | 38,148 |  | $ | 72.20
﻿ |  |  |  |  |  |
﻿

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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=58740216&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both performance-based awards (or share units) outstanding and performance-based awards (or share units) fully vested and expected to vest at the date of the latest statement of financial position. + 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=6415400&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=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired 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=6415400&loc=d3e5070-113901 + Details
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