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Stock-based Compensation (Tables)

12 Months Ended

Aug. 31, 2016

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, 2015		62,620		$	34.97
Granted		-		$	-
Exercised		(34,800)		$	34.48
Forfeited or expired		-		$	-
Outstanding at August 31, 2016		27,820		$	35.59			1.0		$	2,302
Exercisable at August 31, 2016		27,820		$	35.59			1.0		$	2,302




Restricted Stock Units [Member]

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

Schedule of Share-based Compensation, 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, 2015		136,895		$	47.19
Granted		23,201		$	95.89
Converted to common shares		(27,595)		$	50.24
Forfeited		(2,466)		$	69.99
Outstanding at August 31, 2016		130,035		$	54.80		$	15,390
Vested at August 31, 2016		99,228		$	47.47		$	11,744




Market Share Units [Member]

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

Schedule of Share-based Payment Award, Valuation Assumptions



	Fiscal Year Ended August 31,
	2016			2015			2014
Expected volatility		22.2%			22.0%			25.2%
Risk-free interest rate		0.9%			0.8%			0.6%
Expected dividend yield		0.0%			0.0%			0.0%




Schedule of Share-based Compensation, 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, 2015		57,604		$	57.37
Granted		15,590		$	120.99
Performance factor adjustments		17,098		$	39.26
Converted to common shares		(40,077)		$	38.17
Forfeited		(4,515)		$	70.58
Outstanding at August 31, 2016		45,700		$	87.82		$	5,409




Deferred Performance Units [Member]

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

Schedule of Share-based Compensation, 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, 2015		30,798		$	75.14
Granted		27,809		$	94.54
Performance factor adjustments		(30,798)		$	75.14
Converted to common shares		-		$	-
Forfeited		(1,486)		$	94.54
Outstanding at August 31, 2016		26,323		$	94.54		$	3,115
Vested at August 31, 2016		5,081		$	94.54		$	601




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