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Stockholders' Equity (Tables)

12 Months Ended

Sep. 30, 2014

Stockholders' Equity

Summary of share repurchase activity

Fiscal Year Period		Total Number of Shares Purchased			Average Price Paid per Share			Total Cash Paid for Shares Purchased			Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs(1)
2009			707,462		$	5.50		$	3,874,000		$	6,126,000
2010			1,225,019		$	11.53			14,471,000			1,655,000
2011			229,575		$	15.39			3,541,000			18,114,000
2012			505,067		$	59.41			30,000,000			18,114,000
2013			—			—			—			31,000,000
2014			2,962,978		$	15.90		$	44,873,000		$	5,127,000

(1) On December 2, 2008, the Company's Board of Directors approved a share repurchase program, under which the Company was authorized to repurchase up to $10.0 million of the issued and outstanding shares of Company common stock. On each of February 2, 2010, November 30, 2010 and May 31, 2011, the Company's Board of Directors approved an additional $10.0 million for the share repurchase program. On May 17, 2012, the Company's Board of Directors approved an additional $30.0 million for the share repurchase program. On December 12, 2013, the Company's Board of Directors approved an additional approximately $12.9 million for the share repurchase program. On February 5, 2014, the Company's Board of Directors approved an additional $19.0 million for the share repurchase program.

Summary of stock option activity

		Options			Weighted- Average Exercise Price
Options outstanding at September 30, 2011			2,894,547		$	11.55
Options granted			181,783			34.42
Options exercised			(1,322,387	)		11.72
Options canceled			(78,148	)		12.72
Options outstanding at September 30, 2012			1,675,795			13.84
Options granted			171,994			35.76
Options exercised			(223,139	)		11.35
Options canceled			(32,244	)		18.67
Options outstanding at September 30, 2013			1,592,406			16.46
Options granted			437,755			22.41
Options exercised			(383,160	)		10.83
Options canceled			(181,094	)		18.14
Options outstanding at September 30, 2014			1,465,907			19.50
Options exercisable at September 30, 2014			890,103			16.15

Summary of information about options outstanding and exercisable

        The following table summarizes information about options outstanding at September 30, 2014:

		Options Outstanding
Range of Exercise Price		Number Outstanding			Weighted- Average Remaining Contractual Life			Weighted- Average Exercise Price
$3.00 - 8.00			148,448			4.20		$	7.38
$8.23 - $46.72			1,317,459			6.52			20.87
			1,465,907			6.10			19.50

        The following table summarizes information about options exercisable at September 30, 2014:

		Options Exercisable
Range of Exercise Price		Number Exercisable			Weighted- Average Remaining Contractual Life			Weighted- Average Exercise Price
$3.00 - $46.72			890,103			4.38		$	16.15

Summary of information about assumptions used in valuing options granted

		Year ended September 30
		2014			2013			2012
Dividend yield			—			—			—
Expected volatility			50.9% - 60.6%			51.8% - 60.6%			60.4	%
Risk-free interest rate			0.1% - 1.2%			0.1% - 1.0%			0.6	%
Expected forfeiture rate			19.7% - 22.8%			19.7%			19.0	%

Summary of restricted share activity

		Restricted Shares			Weighted- Average Fair Value
Unvested restricted shares at September 30, 2011			1,294,082		$	13.13
Restricted shares granted			633,647			34.05
Restricted shares vested			(390,068	)		12.53
Restricted shares canceled			(138,052	)		15.70
Unvested restricted shares at September 30, 2012			1,399,609			22.51
Restricted shares granted			997,857			36.97
Restricted shares vested			(450,514	)		21.18
Restricted shares canceled			(403,083	)		35.39
Unvested restricted shares at September 30, 2013			1,543,869			28.89
Restricted shares granted			1,040,748			18.78
Restricted shares vested			(436,204	)		24.72
Restricted shares canceled			(250,586	)		23.87
Unvested restricted shares at September 30, 2014			1,897,827			24.96

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