Investments (Continuous Unrealized Loss Positions) (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Mar. 31, 2018
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	$ 1,662	$ 7,086
Unrealized Losses, less than 12 months	(17)	(111)
12 Months or Longer, Fair Value	8,895	6,456
Unrealized losses, 12 months or longer	(141)	(230)
Total Fair Value	10,557	13,542
Unrealized Losses	(158)	(341)
U.S. Treasury and government debt securities
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	0	293
Unrealized Losses, less than 12 months	0	(7)
12 Months or Longer, Fair Value	297	0
Unrealized losses, 12 months or longer	(3)	0
Total Fair Value	297	293
Unrealized Losses	(3)	(7)
Mortgage-backed securities
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	1,066	3,185
Unrealized Losses, less than 12 months	(9)	(52)
12 Months or Longer, Fair Value	5,206	3,909
Unrealized losses, 12 months or longer	(110)	(103)
Total Fair Value	6,272	7,094
Unrealized Losses	(119)	(155)
States and political subdivision debt securities
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	353	2,224
Unrealized Losses, less than 12 months	0	(40)
12 Months or Longer, Fair Value	2,319	2,180
Unrealized losses, 12 months or longer	(17)	(109)
Total Fair Value	2,672	4,404
Unrealized Losses	(17)	(149)
Corporate debt securities
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	243	1,384
Unrealized Losses, less than 12 months	(8)	(12)
12 Months or Longer, Fair Value	1,073	367
Unrealized losses, 12 months or longer	(11)	(18)
Total Fair Value	1,316	1,751
Unrealized Losses	$ (19)	$ (30)