Stock-Based Compensation (Tables)

3 Months Ended

Dec. 31, 2011

Stock-Based Compensation

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

	Three Months Ended
	December 31,
	2011		2010
Compensation expense
Stock options	$	2,488	$	2,115
Restricted stock	1,434		1,072
	$	3,922	$	3,187

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

	2011		2010
Risk-free interest rate	1.0	%	1.9	%
Expected stock volatility	53.3	%	51.6	%
Dividend yield	0.4	%	0.5	%
Expected term (in years)	5.5		5.5

Summary of stock option activity

	Three Months Ended December 31, 2011
					Weighted-
			Weighted-		Average	Aggregate
			Average		Remaining	Intrinsic
	Shares		Exercise		Contractual Term	Value
Options	(in thousands)		Price		(in years)	(in millions)
Outstanding at October 1, 2011	4,589		$	25.84
Granted	459		59.76
Exercised	(205	)	14.79
Forfeited/Expired	(23	)	36.10
Outstanding at December 31, 2011	4,820		$	29.49	5.6	$	139.8
Vested and expected to vest at December 31, 2011	4,762		$	29.39	5.5	$	138.6
Exercisable at December 31, 2011	3,688		$	24.62	4.6	$	124.4

Summary of restricted stock awards and changes in restricted stock outstanding

	Three Months Ended
	December 31, 2011
			Weighted-
			Average
	Shares		Grant-Date
Restricted Stock Awards	(in thousands)		Fair Value
Unvested at October 1, 2011	323		$	42.38
Granted	244		59.76
Vested (1)	(119	)	40.21
Forfeited	(7	)	41.93
Unvested at December 31, 2011	441		$	52.59

(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.