Fair Value Measurements (Assets Measured at Fair Value on a Recurring Basis) (Details) - USD ($)		12 Months Ended
		Mar. 30, 2019		Mar. 31, 2018
Summary of Assets Measured at Fair Value on a Recurring Basis
Fair Value, Assets, Level 1, Level 2, or Level 3 Transfers, Amount		$ 0
Recurring | Securities issued by the U.S. Treasury and Government
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	297,000		$ 293,000
Recurring | Mortgage-backed securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	6,509,000		7,499,000
Recurring | Securities issued by states and political subdivisions
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	4,983,000		6,337,000
Recurring | Corporate debt securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	1,619,000		2,052,000
Recurring | Marketable equity securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value		11,073,000	[2]	8,695,000	[1]
Level 1 | Recurring | Securities issued by the U.S. Treasury and Government
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0		0
Level 1 | Recurring | Mortgage-backed securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0		0
Level 1 | Recurring | Securities issued by states and political subdivisions
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0		0
Level 1 | Recurring | Corporate debt securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0		0
Level 1 | Recurring | Marketable equity securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value		11,073,000	[2]	8,695,000	[1]
Level 2 | Recurring | Securities issued by the U.S. Treasury and Government
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	297,000		293,000
Level 2 | Recurring | Mortgage-backed securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	6,509,000		7,499,000
Level 2 | Recurring | Securities issued by states and political subdivisions
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	4,983,000		6,337,000
Level 2 | Recurring | Corporate debt securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	1,619,000		2,052,000
Level 2 | Recurring | Marketable equity securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value		0	[2]	0	[1]
Level 3 | Recurring | Securities issued by the U.S. Treasury and Government
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0		0
Level 3 | Recurring | Mortgage-backed securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0		0
Level 3 | Recurring | Securities issued by states and political subdivisions
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0		0
Level 3 | Recurring | Corporate debt securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0		0
Level 3 | Recurring | Marketable equity securities
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value		0	[2]	0	[1]
Mortgage Servicing Rights | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	1,372,000		1,410,000
Mortgage Servicing Rights | Level 1 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	0		0
Mortgage Servicing Rights | Level 2 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	0		0
Mortgage Servicing Rights | Level 3 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	1,372,000		1,410,000
Forward loan sale commitments | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	(59,000)		26,000
Forward loan sale commitments | Level 1 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	0		0
Forward loan sale commitments | Level 2 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	0		0
Forward loan sale commitments | Level 3 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	(59,000)		26,000
Interest rate lock commitments | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	(11,000)		12,000
Interest rate lock commitments | Level 1 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	0		0
Interest rate lock commitments | Level 2 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	0		0
Interest rate lock commitments | Level 3 | Recurring
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	$ (11,000)		$ 12,000

[1] Unrealized gains or losses on investments are recorded in AOCI at each measurement date.

[2] Unrealized gains or losses on investments are recorded in earnings at each measurement date.

[3] Changes in the fair value of mortgage servicing rights are recognized in the current period earnings through net revenue.

[4] Gains or losses on derivatives are recognized in current period earnings through cost of sales.