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Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2016

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,
		2016			2015			2016			2015
		(in thousands)						(in thousands)
Compensation expense
Stock options		$	1,776		$	1,908		$	5,326		$	4,970
Restricted stock		4,290			4,189			8,661			8,109
		$	6,066		$	6,097		$	13,987		$	13,079

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

		Three Months Ended March 31, 2016
							Weighted-
				Weighted-			Average		Aggregate
				Average			Remaining		Intrinsic
		Shares		Exercise			Contractual Term		Value
Options		(in thousands)		Price			(in years)		(in millions)
Outstanding at January 1, 2016		3,531		$	51.51
Granted		—		58.25
Exercised		(61	)	30.94
Forfeited/Expired		(14	)	58.25
Outstanding at March 31, 2016		3,456		$	51.85		6.2		$	31.6
Vested and expected to vest at March 31, 2016		3,411		$	51.74		6.2		$	31.6
Exercisable at March 31, 2016		2,270		$	46.46		4.7		$	31.6

		Six Months Ended March 31, 2016
				Weighted-
				Average
		Shares		Exercise
Options		(in thousands)		Price
Outstanding at October 1, 2015		2,776		$	48.51
Granted		876		58.25
Exercised		(180	)	31.10
Forfeited/Expired		(16	)	57.74
Outstanding at March 31, 2016		3,456		$	51.85

Summary of restricted stock awards and changes in restricted stock outstanding

		Six Months Ended
		March 31, 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		(9	)	63.18
Unvested at March 31, 2016		697		$	64.21

(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.

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- Definition

Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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