Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands		Jun. 30, 2018	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Servicing Asset at Fair Value, Amount		$ 1,443	$ 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		87,726
Construction Loan		12,259
Consumer Loans Receivable		31,301
Recurring [Member] | US Treasury and Government [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	292
Recurring [Member] | Mortgage-backed securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	7,152
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]	6,029
Recurring [Member] | Corporate debt securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[1]	2,050
Recurring [Member] | Marketable equity securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[2]	12,736
Recurring [Member] | Interest rate lock commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	8
Recurring [Member] | Forward loan sale commitments [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[3]	149
Recurring [Member] | Mortgage servicing rights [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value	[4]	1,443
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]	12,736
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]	292
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]	7,152
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]	6,029
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]	2,050
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		87,726
Construction Loan		12,259
Consumer Loans Receivable		31,301
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]	8
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]	149
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]	$ 1,443

[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.