Loans Receivable, Net - Text Tag (Details)	12 Months Ended
Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts		1	0
Financing Receivable, Modifications, Recorded Investment	$ 7,500,000	$ 3,900,000
Financing Receivable, Number of Principal and Interest Payment Deferrals	83
Financing Receivable, Principal and Interest Deferred Payments	$ 90,400,000
FNMA & 3rd party loans excluded from financial statements	16,800,000	$ 18,300,000
Loans Pledged as Collateral	$ 42,800,000
Number of Loans Originated Under the Paycheck Protection Program	304
Loans Originated Under the Paycheck Protection Program, Amount	$ 42,900,000
Financing Receivable, Principal and Interest Deferred Payments	90,400,000
Other non-performing asset	$ 60,000
Number of Real Estate Properties	1	2
Loans held-for-sale (HFS)	$ 0
Loans Receivable, Impaired, Interest Lost on Nonaccrual Loans	161,000	$ 119,000
Loans 90 Days Past Due and Still Accruing		$ 0	$ 0
Modified Loan Subsequently Defaulted		0	0
Loans and Leases Receivable, Related Parties	60,000	$ 70,000
Loans and Leases Receivable, Related Parties, Additions	0
Loans and Leases Receivable, Related Parties, Proceeds	$ 10,000
Business
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 4,949,000
Financing Receivable, Number of Principal and Interest Payment Deferrals	61
Financing Receivable, Principal and Interest Deferred Payments	$ 83,500,000
Overdrafts	10,000	10,000
Financing Receivable, Principal and Interest Deferred Payments	83,500,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Overdrafts	10,000	10,000
Consumer
Financing Receivable, Modifications [Line Items]
Overdrafts	44,000	15,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Overdrafts	$ 44,000	15,000
One-to-four family
Financing Receivable, Modifications [Line Items]
Financing Receivable, Number of Principal and Interest Payment Deferrals	22
Financing Receivable, Principal and Interest Deferred Payments	$ 6,900,000
Financing Receivable, Principal and Interest Deferred Payments	6,900,000
Non-performing
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 1,800,000	$ 2,200,000

Represents number of request for payment deferrals.

No definition available.

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- Definition

Deferred amounts of principal and interest payments on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

+ References

No definition available.

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- Definition

FNMA & 3rd party loans excluded from financial statements

+ References

No definition available.

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- Definition

Represents the aggregate dollar amount of loans that have been originated under the Paycheck Protection Program

+ References

No definition available.

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- Definition

Number of Loans Originated Under the Paycheck Protection Program

+ References

No definition available.

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- Definition

Other non-performing asset

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

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- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

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- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

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- Definition

Amount of financing receivable 90 days or more past due and still accruing.

+ References

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- Definition

Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

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- Definition

For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

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- Definition

Reflects the amount of new advances made to related parties in the form of loan and lease receivables.

+ References

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- Definition

Amount of cash inflow from related parties which reduce the amount of loans and leases receivable due from related parties.

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- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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- Definition

Amount, before valuation allowance, of financing receivable classified as held-for-sale.

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

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