Investments in Marketable Securities (Details 1) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 26, 2015	Jun. 27, 2015
Continuous unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	$ 24,463	$ 26,944
Less Than 12 Months, Unrealized Losses	274	223
12 Months or Longer, Fair Value	2,789	5,557
12 Months or Longer, Unrealized Losses	53	24
Total, Fair Value	27,252	32,501
Total, Unrealized Losses	$ 327	247
National government and agency securities [Member]
Continuous unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value		1,411
Less Than 12 Months, Unrealized Losses		3
12 Months or Longer, Fair Value		$ 190
12 Months or Longer, Unrealized Losses
Total, Fair Value		$ 1,601
Total, Unrealized Losses		3
State and municipal bond obligations [Member]
Continuous unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	$ 593	928
Less Than 12 Months, Unrealized Losses	6	4
12 Months or Longer, Fair Value	607	1,077
12 Months or Longer, Unrealized Losses	3	7
Total, Fair Value	1,200	2,005
Total, Unrealized Losses	9	11
Corporate bonds and notes [Member]
Continuous unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	18,266	20,621
Less Than 12 Months, Unrealized Losses	239	188
12 Months or Longer, Fair Value	1,758	2,893
12 Months or Longer, Unrealized Losses	35	12
Total, Fair Value	20,024	23,514
Total, Unrealized Losses	274	200
Asset backed securities [Member]
Continuous unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	2,404	1,961
Less Than 12 Months, Unrealized Losses	12	16
12 Months or Longer, Fair Value	424	1,061
12 Months or Longer, Unrealized Losses	15	4
Total, Fair Value	2,828	3,022
Total, Unrealized Losses	27	20
Mortgage backed securities [Member]
Continuous unrealized losses and fair market values of the Company's investments
Less Than 12 months, Fair Value	3,200	2,023
Less Than 12 Months, Unrealized Losses	$ 17	12
12 Months or Longer, Fair Value		336
12 Months or Longer, Unrealized Losses		1
Total, Fair Value	$ 3,200	2,359
Total, Unrealized Losses	$ 17	$ 13