Fair Value Measurements (Assets Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 28, 2020	Mar. 30, 2019
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities		$ 14,774	$ 13,408
Marketable equity securities	[1]	9,829	11,073
Interest rate lock commitment derivatives	[2]	164	11
Forward loan sale commitment derivatives	[2]	(1,011)	(59)
Mortgage servicing rights	[3]	1,225	1,372
Summary of Assets Measured at Fair Value on a Recurring Basis
Fair Value, Assets, Level 1, Level 2, or Level 3 Transfers, Amount		0
Securities issued by the U.S. Treasury and Government
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]		297
Residential mortgage-backed securities
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	5,443	6,509
Securities issued by states and political subdivisions
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	4,370	4,983
Corporate debt securities
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	4,961	1,619
Level 1
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Marketable equity securities	[1]	9,829	11,073
Interest rate lock commitment derivatives	[2]	0	0
Forward loan sale commitment derivatives	[2]	0	0
Mortgage servicing rights	[3]	0	0
Level 1 | Securities issued by the U.S. Treasury and Government
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]		0
Level 1 | Residential mortgage-backed securities
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	0	0
Level 1 | Securities issued by states and political subdivisions
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	0	0
Level 1 | Corporate debt securities
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	0	0
Level 2
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Marketable equity securities	[1]	0	0
Interest rate lock commitment derivatives	[2]	0	0
Forward loan sale commitment derivatives	[2]	0	0
Mortgage servicing rights	[3]	0	0
Level 2 | Securities issued by the U.S. Treasury and Government
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]		297
Level 2 | Residential mortgage-backed securities
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	5,443	6,509
Level 2 | Securities issued by states and political subdivisions
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	4,370	4,983
Level 2 | Corporate debt securities
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	4,961	1,619
Level 3
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Marketable equity securities	[1]	0	0
Interest rate lock commitment derivatives	[2]	164	11
Forward loan sale commitment derivatives	[2]	(1,011)	(59)
Mortgage servicing rights	[3]	1,225	1,372
Level 3 | Securities issued by the U.S. Treasury and Government
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]		0
Level 3 | Residential mortgage-backed securities
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	0	0
Level 3 | Securities issued by states and political subdivisions
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	0	0
Level 3 | Corporate debt securities
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale debt securities	[4]	$ 0	$ 0

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

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

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

[4] Unrealized gains or losses on investments are recorded in Accumulated other comprehensive income (loss) at each measurement date.