Name:	mfbp_EndingBalancesAllowanceForLoanLossesAbstract
Namespace Prefix:	mfbp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	mfbp_EndingBalancesLoansAbstract
Namespace Prefix:	mfbp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524

+ Details

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

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524

+ Details

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

- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524

+ Details

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

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section L

-Subsection 1

+ Details

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

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

+ Details

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

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Ending balances: Allowance for loan losses
Individually evaluated for impairment	$ 436		$ 480
Collectively evaluated for impairment	2,798		3,019
Allowances for loan losses	3,234	3,501	3,499	3,679	3,697	3,850
Ending balances: Loans
Individually evaluated for impairment	25,953		22,203
Collectively evaluated for impairment	147,884		153,019
Loans, net of unearned income and deferred fees	173,837		175,222
Commercial
Ending balances: Allowance for loan losses
Individually evaluated for impairment
Collectively evaluated for impairment	241		90
Allowances for loan losses	241	76	90	61	64	348
Ending balances: Loans
Individually evaluated for impairment
Collectively evaluated for impairment	8,191		3,282
Loans, net of unearned income and deferred fees	8,191		3,282
Commercial Real Estate
Ending balances: Allowance for loan losses
Individually evaluated for impairment			87
Collectively evaluated for impairment	806		794
Allowances for loan losses	806	1,192	881	1,187	1,052	971
Ending balances: Loans
Individually evaluated for impairment	5,775		4,837
Collectively evaluated for impairment	39,127		43,332
Loans, net of unearned income and deferred fees	44,902		48,169
Faith Based Non-Profit
Ending balances: Allowance for loan losses
Individually evaluated for impairment	115		44
Collectively evaluated for impairment	1,163		1,202
Allowances for loan losses	1,278	1,278	1,246	1,091	1,107	1,128
Ending balances: Loans
Individually evaluated for impairment	15,918		14,907
Collectively evaluated for impairment	69,602		70,990
Loans, net of unearned income and deferred fees	85,520		85,897
Residential Real Estate
Ending balances: Allowance for loan losses
Individually evaluated for impairment	321		349
Collectively evaluated for impairment	510		588
Allowances for loan losses	831	851	937	1,243	1,309	1,299
Ending balances: Loans
Individually evaluated for impairment	4,247		2,443
Collectively evaluated for impairment	27,394		31,331
Loans, net of unearned income and deferred fees	31,641		33,774
Consumer
Ending balances: Allowance for loan losses
Individually evaluated for impairment
Collectively evaluated for impairment	22		30
Allowances for loan losses	22	27	30	46	46	62
Ending balances: Loans
Individually evaluated for impairment	13		16
Collectively evaluated for impairment	1,146		1,330
Loans, net of unearned income and deferred fees	1,159		1,346
Other
Ending balances: Allowance for loan losses
Individually evaluated for impairment
Collectively evaluated for impairment	43		54
Allowances for loan losses	43	48	54	51	52	42
Ending balances: Loans
Individually evaluated for impairment
Collectively evaluated for impairment	2,424		2,754
Loans, net of unearned income and deferred fees	2,424		2,754
Unallocated
Ending balances: Allowance for loan losses
Individually evaluated for impairment
Collectively evaluated for impairment	13		261
Allowances for loan losses	13	29	261		67
Ending balances: Loans
Individually evaluated for impairment
Collectively evaluated for impairment
Loans, net of unearned income and deferred fees