Stock-Based Compensation (Tables)

9 Months Ended

Jun. 30, 2013

Stock-Based Compensation [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Fair value is estimated at the grant date based on a Black-Scholes-Merton option-pricing model using the following weighted-average assumptions:

	Nine Months Ended June 30, 2013
Expected stock price volatility	35	%
Expected dividend yield	—	%
Risk free interest rate	0.37	%
Average expected life (in years)	2.88

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following is a summary of stock option activity for the nine months ended June 30, 2013:

	Shares Available for Grant		Number of Options Outstanding		Weighted Average Price		Weighted Average Grant Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value ($ millions)
Balances as of September 30, 2012	921,412		1,890,634		$	23.36	$	11.11	5.45	$	6.0
Expiration of 2003 Plan	(828,321	)
Additional shares authorized	1,000,000
Granted	(100,000	)	100,000		$	17.53	$	4.21
Exercised			(127,268	)	$	5.47	$	2.81
Forfeited	6,666		(18,498	)	$	8.38	$	3.60
Expired	243		(910	)	$	21.23	$	10.27
Balances as of June 30, 2013	1,000,000		1,843,958		$	24.43	$	11.38	4.98	$	3.4
Exercisable as of June 30, 2013			731,352		$	26.67	$	11.07	2.07	$	2.2

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

The following is a summary of restricted stock activity for the nine months ended June 30, 2013:

	Shares Available for Grant		Number of Shares Outstanding		Weighted Average Grant Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value ($ millions)
Balances as of September 30, 2012	1,420,114		512,124		$	22.09	1.81	$	9.8
Granted	(216,502	)	216,502		$	17.76
Vested			(221,585	)	$	21.41
Forfeited	1,165		(8,202	)	$	24.11
Balances as of June 30, 2013	1,204,777		498,839		$	20.48	1.97	$	8.7