Stock-Based Compensation (Tables)

3 Months Ended

Dec. 31, 2015

Stock-Based Compensation

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

	Three Months Ended
	December 31,
	2015		2014
	(in thousands)
Compensation expense
Stock options	$	3,550	$	3,062
Restricted stock	4,371		3,920
	$	7,921	$	6,982

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

	2015		2014
Risk-free interest rate	1.8	%	1.7	%
Expected stock volatility	37.6	%	37.0	%
Dividend yield	4.6	%	3.9	%
Expected term (in years)	5.5		5.5

Summary of stock option activity

	Three Months Ended December 31, 2015
					Weighted-
			Weighted-		Average	Aggregate
			Average		Remaining	Intrinsic
	Shares		Exercise		Contractual Term	Value
Options	(in thousands)		Price		(in years)	(in millions)
Outstanding at October 1, 2015	2,776		$	48.51
Granted	876		58.25
Exercised	(119	)	31.19
Forfeited/Expired	(2	)	54.65
Outstanding at December 31, 2015	3,531		$	51.51	6.4	$	26.6
Vested and expected to vest at December 31, 2015	3,495		$	51.39	6.4	$	26.7
Exercisable at December 31, 2015	2,331		$	46.06	4.9	$	26.6

Summary of restricted stock awards and changes in restricted stock outstanding

	Three Months Ended
	December 31, 2015
			Weighted-
			Average
	Shares		Grant-Date
Restricted Stock Awards	(in thousands)		Fair Value
Unvested at October 1, 2015	668		$	67.03
Granted	294		58.25
Vested (1)	(256	)	64.75
Forfeited	(3	)	68.57
Unvested at December 31, 2015	703		$	64.17

(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.