Stock-Based Compensation (Schedule of Assumptions Used in Estimate of Fair Value of Stock Option Awards) (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Minimum [Member]	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2013 Maximum [Member]	Jun. 30, 2012 Maximum [Member]
Expected term	5 years 9 months 20 days	5 years 10 months 24 days	5 years 9 months 20 days	5 years 10 months 24 days	8 years 7 months 8 days	8 years 6 months
Estimated volatility	54.40%	55.50%	48.70%	48.90%	54.90%	55.60%
Estimated dividend yield	0.90%	0.70%	0.80%	0.70%	1.00%	1.10%
Risk-free interest rate	0.90%	1.30%	0.80%	1.00%	1.30%	1.60%