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Stock-based Compensation (Tables)

12 Months Ended

Aug. 31, 2018

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Stock Options Activity



							Weighted-Average
							Remaining
				Weighted-Average			Contractual Term
	Number of			Exercise Price			Per Share			Aggregate
Stock Options	Shares			Per Share			(in years)			Intrinsic Value
Outstanding at August 31, 2017		5,960		$	36.03
Granted		-		$	-
Exercised		(5,960)		$	36.03
Forfeited or expired		-		$	-
Outstanding at August 31, 2018		-		$	-			-		$	-
Exercisable at August 31, 2018		-		$	-			-		$	-




Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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, 2017		116,770		$	63.61
Granted		24,114		$	111.71
Converted to common shares		(24,471)		$	76.58
Forfeited		(1,105)		$	104.24
Outstanding at August 31, 2018		115,308		$	70.52		$	20,461
Vested at August 31, 2018		87,309		$	59.22		$	15,493




Market Share Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Valuation Assumptions



	Fiscal Year Ended August 31,
	2018			2017			2016
Expected volatility		20.4%			21.1%			22.2%
Risk-free interest rate		1.6%			1.0%			0.9%
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, 2017		44,919		$	94.95
Granted		15,729		$	101.93
Performance factor adjustments		12,194		$	76.04
Converted to common shares		(27,589)		$	74.30
Forfeited		(3,045)		$	91.87
Outstanding at August 31, 2018 (1)		42,208		$	105.81		$	7,490




(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.



Deferred Performance Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Deferred Performance Share Units



				Weighted-Average
				Grant Date
	Number of			Fair Value			Aggregate
Deferred Performance Units	Shares			Per Share			Intrinsic Value
Outstanding at August 31, 2017		30,876		$	107.66
Granted		26,906		$	110.65
Performance factor adjustments		(25,882)		$	110.19
Converted to common shares		(192)		$	94.54
Forfeited		(940)		$	110.65
Outstanding at August 31, 2018		30,768		$	108.14		$	5,460
Vested at August 31, 2018		4,802		$	94.54		$	852




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