Investments (Continuous Unrealized Loss Positions) (Details) - USD ($) $ in Thousands	Apr. 03, 2021	Mar. 28, 2020
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	$ 6,093	$ 4,481
Unrealized Losses, less than 12 months	(35)	(67)
12 Months or Longer, Fair Value	699	1,880
Unrealized losses, 12 months or longer	(8)	(27)
Total Fair Value	6,792	6,361
Unrealized Losses	(43)	(94)
Residential mortgage-backed securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	927	133
Unrealized Losses, less than 12 months	(6)	0
12 Months or Longer, Fair Value	450	1,779
Unrealized losses, 12 months or longer	(7)	(26)
Total Fair Value	1,377	1,912
Unrealized Losses	(13)	(26)
States and political subdivision debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	3,013	601
Unrealized Losses, less than 12 months	(19)	(2)
12 Months or Longer, Fair Value	0	101
Unrealized losses, 12 months or longer		(1)
Total Fair Value	3,013	702
Unrealized Losses	(19)	(3)
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	2,153	3,747
Unrealized Losses, less than 12 months	(10)	(65)
12 Months or Longer, Fair Value	249	0
Unrealized losses, 12 months or longer	(1)	0
Total Fair Value	2,402	3,747
Unrealized Losses	$ (11)	$ (65)