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Shared Based Compensation (Tables) | 12 Months Ended
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Aug. 31, 2013
Share Based Compensation [Abstract] |
Schedule Of Assumptions Used |
|  |  |  |  |  | Grant Year
Weighted-Average Assumptions |  |  |  |  |  | Fiscal 2013 |  | Fiscal 2012
Risk-free interest rate |  |  |  |  |  |  | 1.2% |  |  | 1.7%
Dividend yield |  |  |  |  |  |  | 0.6% |  |  | 0.6%
Expected life (years) |  |  |  |  |  |  | 7 |  |  | 7
Volatility |  |  |  |  |  |  | 56.3% |  |  | 55.9%
Weighted-average grant-date fair value of options granted | $ | 40.09 |  | $ | 31.04
Summary Of Stock Option Activity |
|  | Number of stock options |  | Average Exercise Price |  | Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value ('000s)
Stock options outstanding at August 31, 2011 |  | 136,575 |  | $ | 23.17 |  | 3.1 |  | $ | 5,331
Granted |  | 36,294 |  | $ | 58.10 |  |  |  |  |
Exercised |  | (23,588) |  | $ | 24.10 |  |  |  | $ | 971
Forfeitures |  | (2,983) |  | $ | 58.10 |  |  |  |  |
Stock options outstanding at August 31, 2012 |  | 146,298 |  | $ | 30.97 |  | 3.9 |  | $ | 5,031
Granted |  | 24,684 |  | $ | 75.68 |  |  |  |  |
Exercised |  | (89,390) |  | $ | 22.77 |  |  |  | $ | 4,960
Forfeitures |  | (2,454) |  | $ | 67.03 |  |  |  |  |
Stock options outstanding at August 31, 2013 |  | 79,138 |  | $ | 53.06 |  | 6.4 |  | $ | 1,817
Exercisable at August 31, 2011 |  | 136,575 |  | $ | 23.17 |  | 3.1 |  | $ | 5,331
Exercisable at August 31, 2012 |  | 112,987 |  | $ | 22.97 |  | 2.4 |  | $ | 4,789
Exercisable at August 31, 2013 |  | 31,927 |  | $ | 32.70 |  | 3.0 |  | $ | 1,383
Summary Of Share Based Compensation Additional Information |
|  |  | For the years ended August 31,
$ in thousands |  | 2013 |  | 2012 |  | 2011
Intrinsic value of stock options exercised |  | $ | 4,960 |  | $ | 971 |  | $ | 7,001
Cash received from stock option exercises |  | $ | 2,036 |  | $ | 567 |  | $ | 3,579
Tax benefit realized from stock option exercises |  | $ | 1,817 |  | $ | 368 |  | $ | 2,628
Aggregate grant-date fair value of stock options vested |  | $ | 31.04 |  | $ | N/A |  | $ | 8.13
Summary Of Restricted Stock Units |
|  | Number of restricted stock units |  | Weighted-Average Grant-Date Fair Value
Restricted stock units outstanding at August 31, 2011 |  |  | 71,826 |  | $ | 47.99
Granted |  |  | 40,212 |  |  | 58.27
Vested |  |  | (37,381) |  |  | 47.87
Forfeited |  |  | (7,122) |  |  | 51.16
Restricted stock units outstanding at August 31, 2012 |  |  | 67,535 |  | $ | 54.35
Granted |  |  | 30,551 |  |  | 77.46
Vested |  |  | (37,534) |  |  | 51.82
Forfeited |  |  | (3,121) |  |  | 65.52
Restricted stock units outstanding at August 31, 2013 |  |  | 57,431 |  | $ | 68.06
Schedule Of Performance Stock Status |
|  | Number of performance stock units |  | Weighted-Average Grant-Date Fair Value
Performance stock units outstanding at August 31, 2011 |  |  | 98,625 |  | $ | 42.21
Granted |  |  | 19,386 |  |  | 57.09
Forfeited |  |  | (38,987) |  |  | 43.30
Performance stock units outstanding at August 31, 2012 |  |  | 79,024 |  | $ | 45.32
Granted |  |  | 13,072 |  |  | 74.31
Vested |  |  | (36,634) |  |  | 32.81
Forfeited |  |  | (2,663) |  |  | 60.65
Performance stock units outstanding at August 31, 2013 |  |  | 52,799 |  | $ | 60.41
Schedule Of Share-Based Compensation Expense |
|  |  | For the years ended August 31,
$ in thousands |  | 2013 |  | 2012 |  | 2011
Share-based compensation expense included in cost of |  |  |  |  |  |  |  |  |
operating revenues |  | $ | 214 |  | $ | 225 |  | $ | 157
Research and development |  |  | 233 |  |  | 189 |  |  | 120
Sales and marketing |  |  | 547 |  |  | 524 |  |  | 574
General and administrative |  |  | 3,579 |  |  | 3,001 |  |  | 2,623
Share-based compensation expense included in |  |  |  |  |  |  |  |  |
operating expenses |  |  | 4,359 |  |  | 3,714 |  |  | 3,317
Total share-based compensation expense |  |  | 4,573 |  |  | 3,939 |  |  | 3,474
Tax benefit |  |  | (1,733) |  |  | (1,493) |  |  | (1,317)
Share-based compensation expense, net of tax |  | $ | 2,840 |  | $ | 2,446 |  | $ | 2,157

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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=21915506&loc=d3e1928-114920 + Details
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