Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands		Sep. 29, 2018	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Servicing Asset at Fair Value, Amount		$ 1,519	$ 1,410
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans Held for Investment Fair Value Disclosure		83,139
Construction Loan		11,001
Consumer Loans Receivable		31,047
Recurring [Member] | US Treasury and Government [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	290
Recurring [Member] | Mortgage-backed securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	7,507
Recurring [Member] | Securities issued by states and political subdivisions [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	5,481
Recurring [Member] | Corporate debt securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	1,622
Recurring [Member] | Marketable equity securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[2]	12,409
Recurring [Member] | Interest rate lock commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	1
Recurring [Member] | Forward loan sale commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	(88)
Recurring [Member] | Mortgage servicing rights [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	1,519
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans Held for Investment Fair Value Disclosure		0
Construction Loan		0
Consumer Loans Receivable		0
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | US Treasury and Government [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Mortgage-backed securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Securities issued by states and political subdivisions [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Corporate debt securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Marketable equity securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[2]	12,409
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Interest rate lock commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	0
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Forward loan sale commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	0
Fair Value, Inputs, Level 1 [Member] | Recurring [Member] | Mortgage servicing rights [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans Held for Investment Fair Value Disclosure		0
Construction Loan		0
Consumer Loans Receivable		0
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | US Treasury and Government [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	290
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Mortgage-backed securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	7,507
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Securities issued by states and political subdivisions [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	5,481
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Corporate debt securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	1,622
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Marketable equity securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[2]	0
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Interest rate lock commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	0
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Forward loan sale commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	0
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Mortgage servicing rights [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans Held for Investment Fair Value Disclosure		83,139
Construction Loan		11,001
Consumer Loans Receivable		31,047
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | US Treasury and Government [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Mortgage-backed securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Securities issued by states and political subdivisions [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Corporate debt securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	0
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Marketable equity securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[2]	0
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate lock commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	1
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Forward loan sale commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	(88)
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Mortgage servicing rights [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	$ 1,519

[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.