Investments Investments (Narrative) (Details) - USD ($)	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	$ 0
Investments (Textual) [Abstract]
Gross gains realized	431,000	$ 871,000
Gross losses realized	(385,000)	(254,000)
Common stock of industrial and other companies [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	7,700,000	5,400,000
Total unrealized losses	(409,000)	(85,000)
Common stock of bank trust, insurance, and public utility companies [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value	100,000	100,000
Total unrealized losses	$ (3,000)	$ (3,000)