Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Assets Measured on Recurring Basis

The following tables represent the Company’s fair value hierarchy for financial assets measured at fair value on a recurring basis:

	September 30, 2012		September 30, 2011
	(Level 1)		(Level 1)
	(In thousands)
Money market instruments (1)	$	34,317	$	34,281
Semiconductor Manufacturing International Corp.
(SMIC) common stock (2)	1,099		1,497
Nanya Technology Corporation (Nanya) common stock (3)	14,752		—
	$	50,168	$	35,778

(1) Included in cash and cash equivalents

(2) Included in short-term investments

(3) Included in other assets

Available-for-sale Securities

Available-for-sale marketable securities consisted of the following:

	Amortized Cost			Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
	(in thousands)
September 30, 2012
Money market instruments	$	34,317		$	—	$	—		$	34,317
Certificates of deposit	18,302			—		—			18,302
SMIC common stock	1,099			—		—			1,099
Nanya common stock	16,587			—		(1,835		)	14,752
Total	70,305			—		(1,835		)	68,470
Less: Amounts included in cash, cash equivalents
and restricted cash	(47,177		)	—		—			(47,177		)
	$	23,128		$	—	$	(1,835	)	$	21,293

	Amortized Cost			Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
	(in thousands)
September 30, 2011
Money market instruments	$	34,281		$	—	$	—		$	34,281
Certificates of deposit	12,051			—		—			12,051
SMIC common stock	3,426			—		(1,929		)	1,497
Total	49,758			—		(1,929		)	47,829
Less: Amounts included in cash, cash equivalents
and restricted cash	(43,068		)	—		—			(43,068		)
	$	6,690		$	—	$	(1,929	)	$	4,761