Investments, Fair Value of Investments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Jun. 30, 2013
Investments [Abstract]
Corporate debt		$ 40
U.S. government and agency obligations		11,016
Equity securities	28,590	17,365
Total investments at fair value	28,590	28,421
Measured at Fair Value on a Recurring Basis [Member] | Level 1 [Member]
Investments [Abstract]
Corporate debt		0
U.S. government and agency obligations		6,004
Equity securities	28,590	17,365
Total investments at fair value	28,590	23,369
Measured at Fair Value on a Recurring Basis [Member] | Level 2 [Member]
Investments [Abstract]
Corporate debt		40
U.S. government and agency obligations		5,012
Equity securities	0	0
Total investments at fair value	0	5,052
Measured at Fair Value on a Recurring Basis [Member] | Level 3 [Member]
Investments [Abstract]
Corporate debt		0
U.S. government and agency obligations		0
Equity securities	0	0
Total investments at fair value	$ 0	$ 0