v2.4.0.6

Dividend Restrictions (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012
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Divididends Restrictions [Abstract] |
Amount Available for Dividend Distribution without Prior Approval from Regulatory Agency | $ 27,700

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- Details
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Namespace Prefix: | fmbh_
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- Definition The amount of dividends that may be paid or declared in any calendar year without prior approval of regulatory agencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph e -Article 4 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant