XML 29 R60.htm IDEA: XBRL DOCUMENT v3.19.3

JUNIOR SUBORDINATED DEBENTURES - Additional Information (Details)	6 Months Ended
	Sep. 30, 2019 USD ($) item	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Maximum number of consecutive quarters for deferred payment of each debenture | item	20
Debentures issued to grantor trusts	$ 26,600,000	$ 26,600,000
Common securities issued by grantor trusts	$ 836,000	$ 836,000
Riverview Bancorp Statutory Trust I
Debt Instrument [Line Items]
Interest basis spread on variable rate	1.36%
Description of variable rate	three-month LIBOR
Riverview Bancorp Statutory Trust II
Debt Instrument [Line Items]
Interest basis spread on variable rate	1.35%
Description of variable rate	three-month LIBOR
Merchants Bancorp Statutory Trust I
Debt Instrument [Line Items]
Interest basis spread on variable rate	3.10%
Description of variable rate	three-month LIBOR

X

- Definition

Amount of the common securities issued by the grantor trusts, and which were purchased by the Company, and included in prepaid expenses and other assets in the Consolidated Balance Sheets.

+ References

No definition available.

+ Details

Name:	rvsb_CommonSecuritiesIssuedByGrantorTrusts
Namespace Prefix:	rvsb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of the debentures issued by the company to the grantor trusts.

+ References

No definition available.

+ Details

Name:	rvsb_DebenturesIssuedToGrantorTrusts
Namespace Prefix:	rvsb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the maximum number of consecutive quarters for deferred payment of each debenture.

+ References

No definition available.

+ Details

Name:	rvsb_MaximumNumberOfConsecutiveQuartersForDeferredPaymentOfEachDebenture
Namespace Prefix:	rvsb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	rvsb_IssuanceTrustAxis=rvsb_RiverviewBancorpStatutoryTrustIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	rvsb_IssuanceTrustAxis=rvsb_RiverviewBancorpStatutoryTrustIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	rvsb_IssuanceTrustAxis=rvsb_MerchantsBancorpStatutoryTrustIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: