Stock-Based Compensation (Tables)

9 Months Ended

Jun. 30, 2017

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,
	2017		2016		2017		2016
	(in thousands)				(in thousands)
Compensation expense
Stock options	$	1,934	$	1,722	$	5,455	$	7,048
Restricted stock		4,834		3,952		13,792		12,613
	$	6,768	$	5,674	$	19,247	$	19,661

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

	2017		2016
Risk-free interest rate	2.0	%	1.8	%
Expected stock volatility	38.9	%	37.6	%
Dividend yield	3.7	%	4.6	%
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, 2017
				Weighted
				Average
		Weighted		Remaining	Aggregate
		Average		Contractual	Intrinsic
	Shares	Exercise		Term	Value
	(in thousands)	Price		(in years)	(in millions)
Outstanding at April 1, 2017	3,293	$	55.90	—		—
Granted	62		53.11	—		—
Exercised	(15)		35.11	—		—
Forfeited/Expired	—		—	—	$	—
Outstanding at June 30, 2017	3,340	$	55.93	5.8	$	19.7
Vested and expected to vest at June 30, 2017	3,286	$	55.71	5.7	$	19.7
Exercisable at June 30, 2017	2,229	$	50.31	4.4	$	19.6

	Nine Months Ended
	June 30, 2017
		Weighted
		Average
	Shares	Exercise
	(in thousands)	Price
Outstanding at October 1, 2016	3,312	$	51.74
Granted	396		76.61
Exercised	(355)		39.38
Forfeited/Expired	(13)		70.37
Outstanding at June 30, 2017	3,340	$	55.93

Summary of restricted stock awards and changes in restricted stock outstanding

	Nine Months Ended
	June 30, 2017
		Weighted
		Average
	Shares	Exercise
	(in thousands)	Price
Unvested at October 1,	648	$	64.24
Granted	292		78.69
Vested (1)	(271)		63.81
Forfeited	(9)		67.79
Unvested on June 30, 2017	660	$	70.76

(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.