XML 75 R65.htm IDEA: XBRL DOCUMENT v3.8.0.1

FAIR VALUE MEASUREMENTS: Fair Value Measurements, Nonrecurring, Valuation Techniques (Details 2) - Impaired loans		9 Months Ended	12 Months Ended
		Dec. 31, 2017	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements, Valuation Techniques		Appraised value	Appraised value
Significant unobservable inputs		Adjustment for market conditions	Adjustment for market conditions
Market adjustment to appraisals	[1]	0.00%	0.00%
[1] There were no adjustments to appraised values of impaired loans as of December 31, 2017 or March 31, 2017.

X

- Definition

Minimum or maximum values of the market adjustment to appraisals.

+ References

No definition available.

+ Details

Name:	rvsb_MarketAdjustmentToAppraisals
Namespace Prefix:	rvsb_
Data Type:	num:percentItemType
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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of significant assumptions used by management to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

+ Details

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

X

- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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

X

- Details

Name:	rvsb_NonRecurringAssetsAxis=rvsb_ImpairedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: