Investments (Amortized cost and fair value) (Details) - USD ($) $ in Thousands	Dec. 30, 2023	Apr. 01, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 19,664	$ 19,335
Fair Value	19,207	18,555
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,888	2,567
Fair Value	1,836	2,488
State and political subdivision debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,652	6,023
Fair Value	5,515	5,769
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,124	10,745
Fair Value	$ 11,856	$ 10,298