Investments, Available-for-sale Securities, Additional Disclosures (Details) (USD $)	3 Months Ended		6 Months Ended
	Dec. 29, 2013	Dec. 23, 2012	Dec. 29, 2013	Dec. 23, 2012	Jun. 30, 2013
Available-for-sale securities, additional disclosures [Abstract]
Available-for-sale Securities, Gross Realized Gains	$ 0	$ 0	$ 0	$ 0
Available-for-sale Securities, Gross Realized Losses	0	0	0	0
Proceeds from Sale of Available-for-sale Securities	0	52,100,000	36,000	52,131,000
Continuous unrealized loss position, market value [Abstract]
Market value, securities held in a loss position for less than 12 months					1,052,000
Market value, securities held in a loss position for 12 months or more					0
Market value, total in a loss position					1,052,000
Continuous unrealized loss position, gross unrealized losses [Abstract]
Gross unrealized losses, securities held in a loss position for less than 12 months					(5,000)
Gross unrealized losses, securities held in a loss position for 12 months or more					0
Gross unrealized losses, total in a loss position					(5,000)
Amortized cost, by contractual maturity [Abstract]
Amortized cost, Due in 1 year or less	4,999,000		4,999,000
Amortized cost, Total investments	4,999,000		4,999,000
Estimated market value, by contractual maturity [Abstract]
Estimated market value, Due in 1 year or less	5,001,000		5,001,000
Estimated market value, Total investments	5,001,000		5,001,000
Equity Securities [Member]
Continuous unrealized loss position, market value [Abstract]
Market value, securities held in a loss position for less than 12 months					1,052,000
Market value, securities held in a loss position for 12 months or more					0
Market value, total in a loss position					1,052,000
Continuous unrealized loss position, gross unrealized losses [Abstract]
Gross unrealized losses, securities held in a loss position for less than 12 months					(5,000)
Gross unrealized losses, securities held in a loss position for 12 months or more					0
Gross unrealized losses, total in a loss position					(5,000)
Publicly traded foreign company (s) - common stock [Member]
Available-for-sale securities, additional disclosures [Abstract]
Number of investments in publicly traded foreign companies			3
Number of strategic investments with a put option	1		1
Fair Value Of Put Option	1,900,000		1,900,000
Dividend income from common stock investments	$ 0	$ 0	$ 100,000	$ 100,000