Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Schedule Of Financial Assets Measured At Fair Value on A Recurring Basis

The Company’s financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2013, were as follows (in thousands):

	Fair Value Measurements at Reporting Date Using						Fair Value at September 30, 2013
	Quoted Prices in Active Markets for Identical Securities (Level  1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash equivalents	$	13,145	$	—	$	—	$	13,145
Short-term investments
Available-for-sale securities — corporate bonds and notes	—		125,212		—		125,212
Available-for-sale securities — municipal bonds and notes	—		72,164		—		72,164
Available-for-sale securities — U.S. government securities	—		5,000		—		5,000
Available-for-sale securities — U.S. government agency securities	—		150,074		—		150,074
Long-term investments
Available-for-sale securities — corporate bonds and notes	—		260,318		—		260,318
Available-for-sale securities — municipal bonds and notes	—		24,371		—		24,371
Available-for-sale securities — U.S. government securities	—		14,798		—		14,798
Available-for-sale securities — U.S. government agency securities	—		426,458		—		426,458
Available-for-sale securities — auction rate securities	—		—		3,036		3,036
Total	$	13,145	$	1,078,395	$	3,036	$	1,094,576

The Company’s financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2012, were as follows (in thousands):

	Fair Value Measurements at Reporting Date Using						Fair Value at September 30, 2012
	Quoted Prices in Active Markets for Identical Securities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash equivalents	$	35,658	$	—	$	—	$	35,658
Short-term investments
Available-for-sale securities — certificates of deposit	—		3,533		—		3,533
Available-for-sale securities — corporate bonds and notes	—		193,990		—		193,990
Available-for-sale securities — municipal bonds and notes	—		63,422				63,422
Available-for-sale securities — U.S. government agency securities	—		60,025		—		60,025
Long-term investments
Available-for-sale securities — corporate bonds and notes	—		229,441		—		229,441
Available-for-sale securities — municipal bonds and notes	—		30,307		—		30,307
Available-for-sale securities — U.S. government securities	—		4,995		—		4,995
Available-for-sale securities — U.S. government agency securities	—		393,310		—		393,310
Available-for-sale securities — auction rate securities	—		—		4,750		4,750
Total	$	35,658	$	979,023	$	4,750	$	1,019,431

Schedule Of Reconciliation Of Items Measured At Fair Value On A Recurring Basis That Used Significant Unobservable Inputs (Level 3)

The following table provides a reconciliation between the beginning and ending balances of items measured at fair value on a recurring basis in the tables above that used significant unobservable inputs (Level 3) (in thousands):

	2013			2012
Balance, beginning of period	$	4,750		$	13,010
Total (losses) gains realized or unrealized:
Included in other comprehensive income	(14		)	1,740
Settlements	(1,700		)	(10,000		)
Balance, end of period	$	3,036		$	4,750
Unrealized (losses) gains attributable to assets still held as of the end of the period	(14		)	112