Investments (Tables)

3 Months Ended

12 Months Ended

Sep. 25, 2011

Jun. 26, 2011

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-Sale Securities

Available-for-sale securities as of September 25, 2011 are summarized as follows (in thousands):

	Amortized Costs		Gross Unrealized Gain		Gross Unrealized Loss			Net Unrealized Gain (Loss)			Market Value
Short-Term Investments:
Corporate debt	$	67,875	$	48	$	—		$	48		$	67,923
U.S. government and agency obligations		104,213	$	115		(3	)		112			104,325
Total short-term investments	$	172,088	$	163	$	(3	)	$	160		$	172,248
Long-Term Investments:
U.S. government and agency obligations	$	4,497	$	16	$	—		$	16		$	4,513
Asset-backed securities		306		—		(4	)		(4	)		302
Total long-term investments	$	4,803	$	16	$	(4	)	$	12		$	4,815
Equity securities	$	12,428	$	2,855	$	(304	)	$	2,551		$	14,979

Available-for-sale securities as of June 26, 2011 are summarized as follows (in thousands):

	Amortized Costs		Gross Unrealized Gain		Gross Unrealized Loss		Net Unrealized Gain		Market Value
Short-Term Investments:
Corporate debt	$	55,964	$	51	$	—	$	51	$	56,015
U.S. government and agency obligations		129,352	$	174		—		174		129,526
Total short-term investments	$	185,316	$	225	$	—	$	225	$	185,541
Long-Term Investments:
U.S. government and agency obligations	$	12,501	$	43	$	—	$	43	$	12,544
Asset-backed securities		594		187		—		187		781
Total long-term investments	$	13,095	$	230	$	—	$	230	$	13,325
Equity securities	$	12,963	$	9,473	$	—	$	9,473	$	22,436

Fair Value and Gross Unrealized Losses Related to Available-for-sale Securities

The following table summarizes the fair value and gross unrealized losses related to available-for-sale investments, aggregated by type of investment and length of time that individual securities have been held. The unrealized loss position is measured and determined at each fiscal quarter end (in thousands):

	Securities held in a loss position for less than 12 months at September 25, 2011					Securities held in a loss position for 12 months or more at September 25, 2011				Total in a loss position at September 25, 2011
	Market Value		Gross Unrealized Losses			Market Value		Gross Unrealized Losses		Market Value		Gross Unrealized Losses
U.S. government and agency obligations	$	7,092	$	(3	)	$	—	$	—	$	7,092	$	(3	)
Asset-backed securities		302		(4	)		—		—		302		(4	)
Total	$	7,394	$	(7	)	$	—	$	—	$	7,394	$	(7	)

Amortized Cost and Estimated Fair Value of Investments by Contractual Maturity

The amortized cost and estimated fair value of investments at September 25, 2011, by contractual maturity, are as follows (in thousands):

Contractual Maturity (1)	Amortized Cost		Estimated Market Value
Due in 1 year or less	$	172,088	$	172,248
Due in 1-2 years		4,497		4,513
Due in 2-5 years		—		—
Due after 5 years		306		302
Total investments	$	176,891	$	177,063

(1) Contractual maturity for asset-backed securities was based on initial contractual maturity dates.

Investments Measured at Fair Value on a Recurring Basis

The following table presents the balances of investments measured at fair value on a recurring basis as of September 25, 2011 (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Corporate debt	$	67,923	$	—	$	67,923	$	—
U.S. government and agency obligations		108,838		53,619		55,219		—
Asset-backed securities		302		—		—		302
Equity securities-strategic investments		14,979		14,979		—		—
Total securities at fair value	$	192,042	$	68,598	$	123,142	$	302

The following table presents the balances of investments measured at fair value on a recurring basis as of June 26, 2011 (in thousands):

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Corporate debt	$	56,015	$	—	$	56,015	$	—
U.S. government and agency obligations		142,070		79,822		62,248		—
Asset-backed securities		781		—		—		781
Equity securities-strategic investments		22,436		22,436		—		—
Total securities at fair value	$	221,302	$	102,258	$	118,263	$	781