Investments (Tables)

3 Months Ended

Dec. 23, 2012

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-Sale Securities

Available-for-sale securities as of December 23, 2012 are summarized as follows (in thousands):

	Amortized Costs		Gross Unrealized Gain		Gross Unrealized Loss			Net Unrealized Gain		Market Value
Short-Term Investments:
Corporate debt	$	—	$	31	$	—		$	31	$	31
U.S. government and agency obligations		10,067		6		—			6		10,073
Total short-term investments	$	10,067	$	37	$	—		$	37	$	10,104
Long-Term Investments:
U.S. government and agency obligations	$	4,991	$	12	$	—		$	12	$	5,003
Total long-term investments	$	4,991	$	12	$	—		$	12	$	5,003
Equity securities	$	11,630	$	2,259	$	(263	)	$	1,996	$	13,626

Available-for-sale securities as of June 24, 2012 are summarized as follows (in thousands):

	Amortized Costs		Gross Unrealized Gain		Gross Unrealized Loss			Net Unrealized Gain		Market Value
Short-Term Investments:
Corporate debt	$	6,045	$	26	$	—		$	26	$	6,071
U.S. government and agency obligations		57,796		10		(5	)		5		57,801
Total short-term investments	$	63,841	$	36	$	(5	)	$	31	$	63,872
Long-Term Investments:
U.S. government and agency obligations	$	15,053	$	7	$	(6	)	$	1	$	15,054
Total long-term investments	$	15,053	$	7	$	(6	)	$	1	$	15,054
Equity securities	$	11,631	$	3,848	$	—		$	3,848	$	15,479

Other-Than-Temporary Impairments

The following table provides the Company's other-than-temporary impairments for equity and mortgage-backed securities for the three and six months ended December 23, 2012 and December 25, 2011 (in thousands):

	Three Months Ended				Six Months Ended
	December 23, 2012		December 25, 2011		December 23, 2012		December 25, 2011
Privately held domestic company-common and preferred stock	$	―	$	1,500	$	―	$	1,500
Publicly traded foreign company(s)-common stock		―		315		―		850
Mortgage-backed security		―		―		―		29
Total other-than-temporary impairments	$	―	$	1,815	$	―	$	2,379

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

The unrealized loss position is measured and determined at each fiscal quarter end.  The following tables summarize 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 (in thousands):

	Securities heldin a loss positionfor less than12 months atDecember 23, 2012					Securities heldin a loss positionfor 12 monthsor more atDecember 23, 2012				Total in a loss positionat December 23, 2012
	MarketValue		GrossUnrealizedLosses			MarketValue		GrossUnrealizedLosses		MarketValue		GrossUnrealizedLosses
Equity security	$	3,579	$	(263	)	$	—	$	—	$	3,579	$	(263	)
Total	$	3,579	$	(263	)	$	—	$	—	$	3,579	$	(263	)

	Securities heldin a loss positionfor less than12 months atJune 24, 2012					Securities heldin a loss positionfor 12 monthsor more atJune 24, 2012				Total in a loss positionat June 24, 2012
	MarketValue		GrossUnrealizedLosses			MarketValue		GrossUnrealizedLosses		MarketValue		GrossUnrealizedLosses
U.S government and agency obligations	$	46,420	$	(11	)	$	—	$	—	$	46,420	$	(11	)
Total	$	46,420	$	(11	)	$	—	$	—	$	46,420	$	(11	)

Amortized Cost and Estimated Fair Value of Investments by Contractual Maturity

The amortized cost and estimated fair value of investments at December 23, 2012, by contractual maturity, are as follows (in thousands):

Contractual Maturity	AmortizedCost		EstimatedMarket Value
Due in 1 year or less	$	10,067	$	10,104
Due in 1-2 years		4,991		5,003
Total investments	$	15,058	$	15,107

Investments Measured at Fair Value on a Recurring Basis

The following tables present the balances of investments measured at fair value on a recurring basis (in thousands):

	As of December 23, 2012
	Total		Level 1		Level 2		Level 3
Corporate debt	$	31	$	—	$	31	$	—
U.S. government and agency obligations		15,076		6,004		9,072		—
Equity securities-strategic investments		13,626		13,626		—		—
Total securities at fair value	$	28,733	$	19,630	$	9,103	$	—

	As of June 24, 2012
	Total		Level 1		Level 2		Level 3
Corporate debt	$	6,071	$	—	$	6,071	$	—
U.S. government and agency obligations		72,855		43,059		29,796		—
Equity securities-strategic investments		15,479		15,479		—		—
Total securities at fair value	$	94,405	$	58,538	$	35,867	$	—