INVESTMENT SECURITIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
SECURITIES AVAILABLE FOR SALE
Amortized Cost	$ 61,851	$ 64,903	$ 46,890
Gross Unrealized Gains	1,607	1,210	811
Gross Unrealized Losses	(145)	(281)	(290)
Estimated Fair Value	63,313us-gaap_AvailableForSaleSecurities	65,832us-gaap_AvailableForSaleSecurities	47,411us-gaap_AvailableForSaleSecurities
US Treasury
SECURITIES AVAILABLE FOR SALE
Amortized Cost	4,301	5,287
Gross Unrealized Gains	57	3
Gross Unrealized Losses		(10)
Estimated Fair Value	4,358	5,280
US Agencies
SECURITIES AVAILABLE FOR SALE
Amortized Cost	21,173	22,667	17,745
Gross Unrealized Gains	338	144	40
Gross Unrealized Losses	(2)	(94)	(287)
Estimated Fair Value	21,509	22,717	17,498
Corporate Bonds
SECURITIES AVAILABLE FOR SALE
Amortized Cost	12,496	12,558	15,776
Gross Unrealized Gains	115	116	201
Estimated Fair Value	12,611	12,674	15,977
US Agencies - MBS
SECURITIES AVAILABLE FOR SALE
Amortized Cost	12,815	13,461	6,938
Gross Unrealized Gains	278	262	278
Gross Unrealized Losses	(3)	(35)
Estimated Fair Value	13,090	13,688	7,216
Obligations of states and political subdivisions
SECURITIES AVAILABLE FOR SALE
Amortized Cost	11,066	10,930	6,431
Gross Unrealized Gains	819	685	292
Gross Unrealized Losses	(140)	(142)	(3)
Estimated Fair Value	11,745	11,473	6,720
FHLB borrowings and customer relationships
SECURITIES AVAILABLE FOR SALE
Amortized Cost	3,891
Estimated Fair Value	$ 4,126

Amount of accumulated unrealized gain before deducting unrealized loss on investments in available-for-sale securities impacting investments.

No definition available.

+ Details

Name:	mfnc_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
Namespace Prefix:	mfnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of accumulated unrealized loss before deducting unrealized gain on investments in available-for-sale securities impacting investments.

+ References

No definition available.

+ Details

Name:	mfnc_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
Namespace Prefix:	mfnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

+ Details

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

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_SecuritiesPledgedAsCollateralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: