XML 87 R73.htm IDEA: XBRL DOCUMENT
v3.22.1

JUNIOR SUBORDINATED DEBENTURES - Additional Information (Details) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) item | Mar. 31, 2021 USD ($)
JUNIOR SUBORDINATED DEBENTURES |  |
Maximum number of consecutive quarters for deferred payment of each debenture | item | 20 |
Debentures issued to grantor trusts | $ 26,800,000 | $ 26,700,000
Common securities issued by grantor trusts | $ 836,000 | $ 836,000
Riverview Bancorp Statutory Trust I |  |
JUNIOR SUBORDINATED DEBENTURES |  |
Description of variable rate | three-month LIBOR |
Interest basis spread on variable rate | 1.36% |
Riverview Bancorp Statutory Trust II |  |
JUNIOR SUBORDINATED DEBENTURES |  |
Description of variable rate | three-month LIBOR |
Interest basis spread on variable rate | 1.35% |
Merchants Bancorp Statutory Trust I |  |
JUNIOR SUBORDINATED DEBENTURES |  |
Description of variable rate | three-month LIBOR |
Interest basis spread on variable rate | 3.10% |

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: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of reference rate used for variable rate of debt instrument. + 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: |