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Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2017

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,
		2017			2016			2017			2016
		(in thousands)						(in thousands)
Compensation expense
Stock options		$	1,869		$	1,776		$	3,521		$	5,326
Restricted stock			4,709			4,290			8,958			8,661
		$	6,578		$	6,066		$	12,479		$	13,987

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		39.4	%	37.6	%
Dividend yield		3.4	%	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 March 31, 2017
							Weighted
							Average
				Weighted			Remaining		Aggregate
				Average			Contractual		Intrinsic
				Exercise			Term		Value
		Options		Price			(in years)		(in millions)
Outstanding at January 1, 2017		3,290		$	51.74		—			—
Granted		10			69.91		—			—
Exercised		(5)			49.67		—			—
Forfeited/Expired		(2)			53.85		—		$	—
Outstanding at March 31, 2017		3,293		$	55.90		5.9		$	43.9
Vested and expected to vest at March 31, 2017		3,239		$	55.67		5.9		$	43.6
Exercisable at March 31, 2017		2,244		$	50.21		4.6		$	39.6

		Six Months Ended
		March 31, 2017
				Weighted
				Average
				Exercise
		Options		Price
Outstanding at October 1, 2016		3,312		$	51.74
Granted		334			80.95
Exercised		(340)			39.57
Forfeited/Expired		(13)			70.37
Outstanding at March 31, 2017		3,293		$	55.90

Summary of restricted stock awards and changes in restricted stock outstanding

		Six Months Ended
		March 31, 2017
				Weighted
				Average
		Shares		Exercise
		(in thousands)		Price
Unvested at October 1,		648		$	64.24
Granted		266			81.20
Vested (1)		(270)			63.79
Forfeited		(5)			68.52
Unvested on March 31, 2017		639		$	71.46

(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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