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Junior Subordinated Debentures: Schedule of terms of the current Debentures (Details)
$ in Thousands

6 Months Ended

Sep. 30, 2016

USD ($)

Riverview Bancorp Statutory Trust I

Long-term Debt, Gross

$ 7,217

Debt Instrument, Interest Rate Terms

Variable (1)

^[1]

Debt Instrument, Maturity Date, Description

3/2036

Debt Instrument, date of issuance

12/2005

Riverview Bancorp Statutory Trust I | Maximum

Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum

5.88%

Riverview Bancorp Statutory Trust I | Minimum

Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum

2.21%

Riverview Bancorp Statutory Trust II

Long-term Debt, Gross

$ 15,464

Debt Instrument, Interest Rate Terms

Variable (2)

^[2]

Debt Instrument, Maturity Date, Description

9/2037

Debt Instrument, date of issuance

06/2007

Riverview Bancorp Statutory Trust II | Maximum

Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum

7.03%

Riverview Bancorp Statutory Trust II | Minimum

Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum

2.20%

[1]	The trust preferred securities reprice quarterly based on the three-month LIBOR plus 1.36%
[2]	The trust preferred securities reprice quarterly based on the three-month LIBOR plus 1.35%

X

- Definition

Description of the date the debt instrument was issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	rvsb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	na
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X

- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	duration

X

- Details

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Balance Type:
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- Details

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- Details

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X

- Details

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