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Stockholders' Equity (Tables)

12 Months Ended

Sep. 30, 2013

Dividends Declared and Paid

		Year Ended September 30,
		2013			2012			2011
Dividends declared and paid		$	21,866		$	21,351		$	18,581
Dividend per share amount			0.32			0.31			0.27

Stock-based Compensation Expense Recognized

	Year Ended September 30,
	2013			2012			2011
Employee stock-based compensation expense	$	9,414		$	8,628		$	6,590

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

	Year Ended September 30,
	2013						2012					2011
Expected term (years)		5.8	-	8.6			5.9	-	8.5			5.8	-	8.7
Estimated volatility		48.7%	-	54.9%			48.9%	-	55.6%			48.0%	-	54.0%
Estimated dividend yield		0.8%	-	1.0%			0.7%	-	1.1%			1.0%	-	1.3%
Risk-free interest rate		0.8%	-	1.3%			0.8%	-	1.6%			1.8%	-	2.6%

Weighted Average Grant Date Fair Value of Options Granted

	Year Ended September 30,
	2013			2012			2011
Weighted-average grant date fair value of options	$	15.84		$	12.14		$	15.00

Activity for Stock Option Awards

	Number			Weighted-Average Exercise Price
Balance at September 30, 2012		4,556		$	$ 21.79
Options granted		693			$ 33.72
Options exercised		(796)			$ 13.71
Options forfeited		(30)			$ 29.11
Balance at September 30, 2013		4,423			$ 25.06

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		4,423		$	25.06			5.7		$	69,796
Options vested and exercisable		2,685			21.89			4.1			50,888
Options vested and expected to vest		4,329			24.93			5.6			68,902

Other Stock Option Information

	Year Ended September 30,
	2013			2012			2011
Total fair value of stock options vested	$	7,271		$	5,907		$	5,587
Total intrinsic value of options exercised		19,692			12,521			10,145
Cash received from exercises of stock options		8,272			6,180			4,402
Excess tax benefit realized from exercise of stock options		5,154			3,990			3,558

Stock Options [Member]

Changes in Nonvested Stock Options

	Number			Weighted-Average Exercise Price
Balance at September 30, 2012		1,670		$	27.07
Options granted		693			33.72
Options vested		(596)			26.26
Options forfeited		(30)			29.11
Balance at September 30, 2013		1,737			29.97

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