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Shared-Based Compensation (Tables)

12 Months Ended

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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Summary Of Share Based Compensation Additional Information [Table Text Block]

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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.

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-Publisher FASB
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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.

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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.

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Tabular disclosure for stock option 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.

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