Nature of Operations and Significant Accounting Policies (Tables)

12 Months Ended

Aug. 31, 2014

Accounting Policies [Abstract]

Stock option valuation assumptions

The following represents our key weighted average assumptions for stock options granted in the respective fiscal years:

	Year Ended August 31,
	2014			2013			2012
Weighted average fair value	$	10.24		$	5.84		$	14.10
Expected volatility	44.3		%	44.4		%	46.6		%
Expected term	4.5			3.4			4.3
Risk-free interest rate	1.4		%	0.7		%	0.6		%
Dividend yield	0.0		%	0.0		%	0.0		%