Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands		Dec. 28, 2019	Mar. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Mortgage servicing rights		$ 1,263	$ 1,372
Recurring | U.S. Treasury and Government Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]		297
Recurring | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	5,236	6,509
Recurring | Securities issued by states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	3,831	4,983
Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	1,324	1,619
Recurring | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[2]	13,473	11,073
Recurring | Interest rate lock commitment derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives (asset)	[3]	3	11
Recurring | Forward loan sale commitment derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives (asset)	[3]	104
Derivatives (liability)	[3]		(59)
Recurring | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Mortgage servicing rights	[4]	1,263	1,372
Level 1 | Recurring | U.S. Treasury and Government Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]		0
Level 1 | Recurring | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	0	0
Level 1 | Recurring | Securities issued by states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	0	0
Level 1 | Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	0	0
Level 1 | Recurring | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[2]	13,473	11,073
Level 1 | Recurring | Interest rate lock commitment derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives (asset)	[3]	0	0
Level 1 | Recurring | Forward loan sale commitment derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives (asset)	[3]	0
Derivatives (liability)	[3]		0
Level 1 | Recurring | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Mortgage servicing rights	[4]	0	0
Level 2 | Recurring | U.S. Treasury and Government Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]		297
Level 2 | Recurring | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	5,236	6,509
Level 2 | Recurring | Securities issued by states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	3,831	4,983
Level 2 | Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	1,324	1,619
Level 2 | Recurring | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[2]	0	0
Level 2 | Recurring | Interest rate lock commitment derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives (asset)	[3]	0	0
Level 2 | Recurring | Forward loan sale commitment derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives (asset)	[3]	0
Derivatives (liability)	[3]		0
Level 2 | Recurring | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Mortgage servicing rights	[4]	0	0
Level 3 | Recurring | U.S. Treasury and Government Agencies
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]		0
Level 3 | Recurring | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	0	0
Level 3 | Recurring | Securities issued by states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	0	0
Level 3 | Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[1]	0	0
Level 3 | Recurring | Marketable equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	[2]	0	0
Level 3 | Recurring | Interest rate lock commitment derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives (asset)	[3]	3	11
Level 3 | Recurring | Forward loan sale commitment derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives (asset)	[3]	104
Derivatives (liability)	[3]		(59)
Level 3 | Recurring | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Mortgage servicing rights	[4]	$ 1,263	$ 1,372

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

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

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

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