Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2013

Stock-Based Compensation

Summary of compensation cost for stock-based payment arrangements recognized in general and administrative expense

A summary of compensation cost for stock-based payment arrangements recognized in general and administrative expense is as follows (in thousands):

	Three Months Ended				Six Months Ended
	March 31,				March 31,
	2013		2012		2013		2012
Compensation expense
Stock options	$	2,649	$	2,543	$	6,132	$	5,031
Restricted stock	3,049		2,293		5,594		3,727
	$	5,698	$	4,836	$	11,726	$	8,758

Summary of weighted-average assumptions utilized in determining the fair value of options granted

	2013		2012
Risk-free interest rate	0.7	%	1.0	%
Expected stock volatility	53.87	%	53.3	%
Dividend yield	1.1	%	0.4	%
Expected term (in years)	5.5		5.5

Summary of stock option activity

	Three Months Ended March 31, 2013
					Weighted-
			Weighted-		Average	Aggregate
			Average		Remaining	Intrinsic
	Shares		Exercise		Contractual Term	Value
Options	(in thousands)		Price		(in years)	(in millions)
Outstanding at January 1, 2013	4,472		$	33.38
Granted	—		—
Exercised	(164	)	27.14
Forfeited/Expired	(2	)	51.86
Outstanding at March 31, 2013	4,306		$	33.61	5.3	$	116.7
Vested and expected to vest at March 31, 2013	4,286		$	33.55	5.2	$	116.4
Exercisable at March 31, 2013	3,376		$	28.33	4.3	$	109.3

	Six Months Ended March 31, 2013
			Weighted-
			Average
	Shares		Exercise
Options	(in thousands)		Price
Outstanding at October 1, 2012	4,690		$	29.56
Granted	365		54.18
Exercised	(745	)	18.06
Forfeited/Expired	(4	)	52.82
Outstanding at March 31, 2013	4,306		$	33.61

Summary of restricted stock awards and changes in restricted stock outstanding

	Six Months Ended
	March 31, 2013
			Weighted-
			Average
	Shares		Grant-Date
Restricted Stock Awards	(in thousands)		Fair Value
Unvested at October 1, 2012	430		$	52.52
Granted	307		54.18
Vested (1)	(155	)	45.88
Forfeited	(2	)	55.38
Unvested at March 31, 2013	580		$	55.17

(1) The number of restricted stock awards vested includes shares that we withheld on behalf of our employees to satisfy the statutory tax withholding requirements.