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Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2012

Stock-Based Compensation

Schedule of Assumptions Used in Estimate of Fair Value of Stock Option Awards

		Three-Months Ending				Six-Months Ending
		March 31,				March 31,
		2012		2011		2012		2011
Expected term		5.9 years		5.8 years		5.9 - 8.5 years		5.8 - 8.7 years
Estimated volatility		55.5% - 55.6%		54.0%		48.9% - 55.6%		48.0% - 54.0%
Estimated dividend yield		0.7%		1.1%		0.7% - 1.1%		1.1% - 1.3%
Risk-free interest rate		1.0% - 1.3%		2.6%		1.0% - 1.6%		1.9% - 2.6%

Activity for Stock Option Awards

		Three-Months Ending								Six-Months Ending
		March 31, 2012								March 31, 2012
		Number of options				Weighted- Average Exercise Price per Share				Number of options				Weighted- Average Exercise Price per Share
Options, beginning balance			4,858			$	21.34				4,228			$	20.12
Options granted			20				43.27				845				26.00
Options exercised			(205	)			13.90				(390	)			12.86
Options forfeited			—				n/a				(10	)			26.83
Options, ending balance			4,673			$	21.76				4,673			$	21.76

Changes in Nonvested Stock Options

		Three-Months Ending								Six-Months Ending
		March 31, 2012								March 31, 2012
		Number of options				Weighted- Average Exercise Price per Share				Number of options				Weighted- Average Exercise Price per Share
Options, beginning balance			1,713			$	26.80				1,368			$	27.71
Options granted			20				43.27				845				26.00
Options vested			(4	)			29.00				(476	)			27.41
Options forfeited			—				n/a				(8	)			26.83
Options, ending balance			1,729			$	26.99				1,729			$	26.99

Stock Options Vested, Or Expected to Vest and Are Exercisable

		Number				Weighted- Average Exercise Price				Weighted- Average Remaining Life in Years				Aggregate Intrinsic Value
Options outstanding			4,673			$	21.76				6.1			$	98,471
Options vested and exercisable			2,944				18.69				4.5				71,059
Options vested and expected to vest			4,505				21.55				5.9				95,871

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- Definition

Tabular disclosure of the changes in outstanding nonvested shares.

+ References

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