XML 55 R47.htm IDEA: XBRL DOCUMENT v3.25.2

Securities - Schedule of Credit Ratings of HTM Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	$ 5,832	$ 5,979
AAA
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	2,635
A-
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	500
BBB/BBB+
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	1,247
BBB-
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	700
Not Rated
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	750
Corporate securities
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	3,197	3,196
Corporate securities | A-
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	500
Corporate securities | BBB/BBB+
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	1,247
Corporate securities | BBB-
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	700
Corporate securities | Not Rated
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	750
Mortgage-backed Securities
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	2,635	$ 2,783
Mortgage-backed Securities | AAA
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items]
HTM Debt Securities	$ 2,635

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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

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

X

- Definition

Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-5

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-14

+ Details

Name:	us-gaap_HeldToMaturitySecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	srt_CreditRatingStandardPoorsAxis=srt_StandardPoorsAAARatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CreditRatingStandardPoorsAxis=srt_StandardPoorsAMinusRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CreditRatingStandardPoorsAxis=bvfl_StandardAndPoorsBbbBbbPlusRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CreditRatingStandardPoorsAxis=srt_StandardPoorsBBBMinusRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CreditRatingStandardPoorsAxis=bvfl_StandardAndPoorsNotRatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: