Stock-Based Compensation (Tables)

9 Months Ended

Jun. 30, 2016

Stock-Based Compensation

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

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
	(in thousands)				(in thousands)
Compensation expense
Stock options	$	1,722	$	1,930	$	7,048	$	6,900
Restricted stock	3,952		4,111		12,613		12,220
	$	5,674	$	6,041	$	19,661	$	19,120

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

	2016		2015
Risk-free interest rate	1.8	%	1.7	%
Expected stock volatility	37.6	%	36.9	%
Dividend yield	4.6	%	3.9	%
Expected term (in years)	5.5		5.5

Summary of stock option activity under all existing long-term incentive plans

	Three Months Ended June 30, 2016
					Weighted-
			Weighted-		Average	Aggregate
			Average		Remaining	Intrinsic
	Shares		Exercise		Contractual Term	Value
Options	(in thousands)		Price		(in years)	(in millions)
Outstanding at April 1, 2016	3,456		$	51.85
Granted	—		—
Exercised	(24	)	28.00
Forfeited/Expired	(23	)	63.46
Outstanding at June 30, 2016	3,409		$	51.94	6.0	$	55.6
Vested and expected to vest at June 30, 2016	3,381		$	51.89	6.0	$	55.3
Exercisable at June 30, 2016	2,244		$	46.66	4.5	$	48.0

	Nine Months Ended June 30, 2016
			Weighted-
			Average
	Shares		Exercise
Options	(in thousands)		Price
Outstanding at October 1, 2015	2,776		$	48.51
Granted	876		58.25
Exercised	(204	)	30.73
Forfeited/Expired	(39	)	61.04
Outstanding at June 30, 2016	3,409		$	51.94

Summary of restricted stock awards and changes in restricted stock outstanding

	Nine Months Ended
	June 30, 2016
			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	(36	)	63.68
Unvested at June 30, 2016	670		$	64.22

(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.