Investments Investments (Continuous Unrealized Loss Positions) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Apr. 01, 2017
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	$ 9,636	$ 8,563
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(379)	(188)
12 Months or Longer, Fair Value	6,471	4,203
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(235)	(173)
Total Fair Value	16,107	12,766
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	614	361
U.S. Treasury and Government Agencies [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	293	349
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(7)	(1)
12 Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Total Fair Value	293	349
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	7	1
Mortgage-backed securities [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	3,185	3,449
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(52)	(38)
12 Months or Longer, Fair Value	3,909	1,962
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(103)	(52)
Total Fair Value	7,094	5,411
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	155	90
States and political subdivisions [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	2,224	1,948
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(40)	(36)
12 Months or Longer, Fair Value	2,180	2,084
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(109)	(81)
Total Fair Value	4,404	4,032
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	149	117
Corporate Debt Securities [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	1,384	1,424
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(12)	(23)
12 Months or Longer, Fair Value	367	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(18)	0
Total Fair Value	1,751	1,424
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	30	23
Equity Securities [Member]
Investment Securities in a Continuous Unrealized Loss Position
Less than 12 Months, Fair Value	2,550	1,393
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(268)	(90)
12 Months or Longer, Fair Value	15	157
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(5)	(40)
Total Fair Value	2,565	1,550
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 273	$ 130