Regulatory Matters (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Tier-1 Leverage	$ 41,249us-gaap_TierOneLeverageCapital	$ 39,773us-gaap_TierOneLeverageCapital
Common Equity Tier 1	41,249byfc_TierOneCommonEquityCapital
Tier-1	41,249us-gaap_TierOneRiskBasedCapital	39,773us-gaap_TierOneRiskBasedCapital
Total Capital	44,305us-gaap_Capital	42,870us-gaap_Capital
Tier-1 Leverage, ratio (as a percent)	11.73%	11.34%
Common Equity Tier 1, ratio (as a percent)	17.20%
Tier 1, ratio (as a percent)	17.20%	16.41%
Total Capital, ratio (as a percent)	18.47%us-gaap_CapitalToRiskWeightedAssets	17.69%us-gaap_CapitalToRiskWeightedAssets
Leverage required for capital adequacy purposes	14,062	14,028
Common Equity Tier 1 required for capital adequacy purposes	10,794
Tier-1 required for capital adequacy purposes	14,392	9,695
Total Capital required for capital adequacy purposes	19,190	19,390
Leverage required for capital adequacy purposes, ratio (as a percent)	4.00%	4.00%
Common Equity Tier 1 required for capital adequacy purposes, ratio (as a percent)	4.50%
Tier-1 required for capital adequacy purposes, ratio (as a percent)	6.00%	4.00%
Total capital required for capital adequacy purposes, ratio (as a percent)	8.00%	8.00%
Leverage required under consent order	31,639	31,562
Total capital required under consent order	$ 31,182byfc_CapitalRequiredUnderConsentOrder	$ 31,508byfc_CapitalRequiredUnderConsentOrder
Leverage, ratio per consent order (as a percent)	9.00%	9.00%
Total Capital, ratio per consent order (as a percent)	13.00%	13.00%
Conservation Buffer Rule Starting January 2016
Basel III and Dodd Frank Rules
Capital conservation buffer (as a percent)	0.625%
Conservation Buffer Rule Subsequent to 2016
Basel III and Dodd Frank Rules
Capital conservation buffer annual increase (as a percent)	0.625%
Conservation Buffer Rule \| Maximum
Basel III and Dodd Frank Rules
Capital conservation buffer (as a percent)	2.50%
Prior To Corrective Action Rules
Tier-1 required for capital adequacy purposes, ratio (as a percent)		4.00%
Corrective Action Rules
Tier-1 required for capital adequacy purposes, ratio (as a percent)	6.00%

The amount of Tier 1 Leverage Capital required under a consent order.

No definition available.

Name:	byfc_AmountOfTierOneLeverageCapitalRequiredUnderConsentOrder
Namespace Prefix:	byfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	byfc_BaselIIIAndDoddFrankRules
Namespace Prefix:	byfc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the annual increase in the capital conservation buffer rule percentage until the rule minimum percentage is achieved.

+ References

No definition available.

+ Details

Name:	byfc_CapitalConservationBufferAnnualIncrease
Namespace Prefix:	byfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the information pertaining to capital conservation buffer percentage.

+ References

No definition available.

+ Details

Name:	byfc_CapitalConservationBufferInPercentage
Namespace Prefix:	byfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of total capital required under a consent order.

+ References

No definition available.

+ Details

Name:	byfc_CapitalRequiredUnderConsentOrder
Namespace Prefix:	byfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of total capital required under a consent order divided by risk weighted assets as defined in the regulations.

+ References

No definition available.

+ Details

Name:	byfc_CapitalRequiredUnderConsentOrderRatio
Namespace Prefix:	byfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 Common equity Capital as defined in the regulations. Also called Core Capital.

+ References

No definition available.

+ Details

Name:	byfc_TierOneCommonEquityCapital
Namespace Prefix:	byfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Tier 1 common equity Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

No definition available.

+ Details

Name:	byfc_TierOneCommonEquityCapitalRequiredForCapitalAdequacy
Namespace Prefix:	byfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Tier 1 common equity Capital for capital adequacy purposes divided by average assets as defined in the regulations.

+ References

No definition available.

+ Details

Name:	byfc_TierOneCommonEquityCapitalRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix:	byfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 Common equity Capital divided by risk weighted assets as defined in the regulations.

+ References

No definition available.

+ Details

Name:	byfc_TierOneCommonEquityToRiskWeightedAssets
Namespace Prefix:	byfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of Tier 1 Leverage Capital required under a consent order divided by average assets as defined in the regulations.

+ References

No definition available.

+ Details

Name:	byfc_TierOneLeverageCapitalRequiredUnderConsentOrder
Namespace Prefix:	byfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of total capital as defined in the regulations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

+ Details

Name:	us-gaap_Capital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_CapitalRequiredForCapitalAdequacy
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826

+ Details

Name:	us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Total Capital divided by risk weighted assets as defined in the regulations.

+ References

+ Details

Name:	us-gaap_CapitalToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 Leverage Capital divided by average assets as defined in the regulations.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalToAverageAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 Risk Based Capital as defined in the regulations.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 capital divided by risk weighted assets as defined by regulations.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_StatementScenarioAxis=byfc_ConservationBufferRuleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=byfc_ConservationBufferRuleStartingJanuary2016Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=byfc_ConservationBufferRuleSubsequentTo2016Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=byfc_CorrectiveActionRulesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=byfc_PriorToCorrectiveActionRulesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: