Investments, Available-for-sale Securities (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 25, 2011	Jun. 26, 2011
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	$ 12,113	$ 12,963
Gross Unrealized Gain	748	9,473
Gross Unrealized Loss	(412)
Net Unrealized Gain	336	9,473
Market Value	12,449	22,436
Number of investments in publicly traded foreign companies	3
Short-Term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	115,249	185,316
Gross Unrealized Gain	100	225
Gross Unrealized Loss	(5)
Net Unrealized Gain	95	225
Market Value	115,344	185,541
Short-Term Investment [Member] | Corporate Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	42,229	55,964
Gross Unrealized Gain	28	51
Net Unrealized Gain	28	51
Market Value	42,257	56,015
Short-Term Investment [Member] | U.S. Government and Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	73,020	129,352
Gross Unrealized Gain	72	174
Gross Unrealized Loss	(5)
Net Unrealized Gain	67	174
Market Value	73,087	129,526
Long-Term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	10,312	13,095
Gross Unrealized Gain		230
Net Unrealized Gain		230
Market Value	10,312	13,325
Long-Term Investment [Member] | U.S. Government and Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	10,046	12,501
Gross Unrealized Gain		43
Net Unrealized Gain		43
Market Value	10,046	12,544
Long-Term Investment [Member] | Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	266	594
Gross Unrealized Gain		187
Net Unrealized Gain		187
Market Value	$ 266	$ 781