Investments in Marketable Securities (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 28, 2013	Jun. 29, 2013
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	$ 38,539	$ 48,409
Less Than 12 Months, Unrealized Losses	429	720
12 Months or Longer, Fair Value	2,653	5,060
12 Months or Longer, Unrealized Losses	114	136
Total, Fair Value	41,192	53,469
Total, Unrealized Losses	543	856
National government and agency securities [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	184	154
Less Than 12 Months, Unrealized Losses	3	3
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total, Fair Value	184	154
Total, Unrealized Losses	3	3
State and municipal bond obligations [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	2,147	2,364
Less Than 12 Months, Unrealized Losses	24	27
12 Months or Longer, Fair Value
12 Months or Longer, Unrealized Losses
Total, Fair Value	2,147	2,364
Total, Unrealized Losses	24	27
Corporate bonds and notes [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	28,117	36,394
Less Than 12 Months, Unrealized Losses	336	626
12 Months or Longer, Fair Value	2,034	4,298
12 Months or Longer, Unrealized Losses	74	90
Total, Fair Value	30,151	40,692
Total, Unrealized Losses	410	716
Asset backed Securities [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	5,700	5,881
Less Than 12 Months, Unrealized Losses	52	51
12 Months or Longer, Fair Value	411	546
12 Months or Longer, Unrealized Losses	9	9
Total, Fair Value	6,111	6,427
Total, Unrealized Losses	61	60
Mortgage backed securities [Member]
Gross unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	2,391	3,616
Less Than 12 Months, Unrealized Losses	14	13
12 Months or Longer, Fair Value	208	216
12 Months or Longer, Unrealized Losses	31	37
Total, Fair Value	2,599	3,831
Total, Unrealized Losses	$ 45	$ 50