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RECENT ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
RECENT ACCOUNTING PRONOUNCEMENTS
Other securities	$ 500	$ 500

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

No definition available.

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

No definition available.

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