Stock-Based Compensation Stock-Based Compensation (Tables)

3 Months Ended

Dec. 31, 2012

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:

	Three Months Ended December 31, 2012
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 three months ended December 31, 2012:

	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		$	17.92	$	4.31
Exercised			(25,667	)	$	7.10	$	3.27
Forfeited	6,666		(6,666	)	$	7.26	$	3.38
Expired	243		(243	)	$	15.02	$	6.67
Balances as of December 31, 2012	1,000,000		1,958,058		$	23.35	$	10.89	5.20	$	4.7
Exercisable as of December 31, 2012			831,845		$	24.07	$	10.07	2.32	$	3.4

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

The following is a summary of restricted stock activity through December 31, 2012:

	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	(177,034	)	177,034		$	17.84
Vested			(157,408	)	$	20.85
Forfeited	47		(47	)	$	21.40
Balances as of December 31, 2012	1,243,127		531,703		$	21.04	2.30	$	9.3