FEDERAL HOME LOAN BANK OF ATLANTA (“FHLB”) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
FEDERAL HOME LOAN BANK OF ATLANTA ("FHLB") [Abstract]
Required investment in FHLB stock as a percent of total assets	0.09%
Base amount, as a component of the maximum amount of FHLB stock that may be purchased	$ 15.0mfbp_MaximumAmountOfFhlbStockComponent1
Percent of outstanding FHLB advances, as a component of the maximum amount of FHLB stock that may be purchased	4.50%mfbp_MaximumAmountOfFhlbStockComponent2
Carrying value of FHLB stock	$ 0.3us-gaap_FederalHomeLoanBankStock	$ 0.3us-gaap_FederalHomeLoanBankStock

The maximum amount of FHLB capital stock that may be purchased and held by the company is comprised of a calculation including a base value of $26,000,000 plus 4.5% of outstanding FHLB advances. This element is specific to the base amount component.

No definition available.

+ Details

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Balance Type:	debit
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- Definition

+ References

No definition available.

+ Details

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- Definition

The minimum required percentage of ownership in FHLB capital stock, as compared to total assets, required to be maintained in order to retain membership in the FHLB.

+ References

No definition available.

+ Details

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Namespace Prefix:	mfbp_
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- Details

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- Definition

Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 325

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6478792&loc=d3e63345-112809

+ Details

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Balance Type:	debit
Period Type:	instant