Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2014

Stock-Based Compensation

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

	Three Months Ended				Six Months Ended
	March 31,				March 31,
	2014		2013		2014		2013
	(in thousands)				(in thousands)
Compensation expense
Stock options	$	1,989	$	2,649	$	5,642	$	6,132
Restricted stock	3,805		3,049		7,162		5,594
	$	5,794	$	5,698	$	12,804	$	11,726

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

	2014		2013
Risk-free interest rate	1.6	%	0.7	%
Expected stock volatility	52.6	%	53.9	%
Dividend yield	3.1	%	1.1	%
Expected term (in years)	5.5		5.5

Summary of stock option activity

	Three Months Ended March 31, 2014
					Weighted-
			Weighted-		Average	Aggregate
			Average		Remaining	Intrinsic
	Shares		Exercise		Contractual Term	Value
Options	(in thousands)		Price		(in years)	(in millions)
Outstanding at January 1, 2014	3,524		$	39.69
Granted	—		—
Exercised	(701	)	27.71
Forfeited/Expired	(5	)	79.67
Outstanding at March 31, 2014	2,818		$	42.59	5.6	$	183.1
Vested and expected to vest at March 31, 2014	2,810		$	42.55	5.6	$	182.7
Exercisable at March 31, 2014	2,070		$	35.41	4.6	$	149.3

	Six Months Ended March 31, 2014
			Weighted-
			Average
	Shares		Exercise
Options	(in thousands)		Price
Outstanding at October 1, 2013	3,991		$	34.12
Granted	261		79.67
Exercised	(1,428	)	25.57
Forfeited/Expired	(6	)	75.11
Outstanding at March 31, 2014	2,818		$	42.59

Summary of restricted stock awards and changes in restricted stock outstanding

	Six Months Ended
	March 31, 2014
			Weighted-
			Average
	Shares		Grant-Date
Restricted Stock Awards	(in thousands)		Fair Value
Unvested at October 1, 2013	576		$	55.17
Granted	230		79.67
Vested (1)	(157	)	54.08
Forfeited	(6	)	70.39
Unvested at March 31, 2014	643		$	64.08

(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.