XML 35 R71.htm IDEA: XBRL DOCUMENT v2.4.1.9

Servicing - Summary of Mortgage Servicing Rights Capitalized and Amortized (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Servicing Assets at Fair Value [Line Items]
End of Year	$ 2,023us-gaap_ServicingAssetAtAmortizedValue	$ 2,066us-gaap_ServicingAssetAtAmortizedValue
Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Beginning Year	2,066us-gaap_ServicingAssetAtAmortizedValue / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember	2,063us-gaap_ServicingAssetAtAmortizedValue / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember
Capitalized Additions	301us-gaap_ServicingAssetAtAmortizedValueAdditions / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember	429us-gaap_ServicingAssetAtAmortizedValueAdditions / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember
Amortization	(344)us-gaap_ServicingAssetAtAmortizedValueAmortization1 / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember	(426)us-gaap_ServicingAssetAtAmortizedValueAmortization1 / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember
Valuation Allowance	0us-gaap_ServicingAssetAtAmortizedValueValuationAllowance / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember	0us-gaap_ServicingAssetAtAmortizedValueValuationAllowance / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember
End of Year	$ 2,023us-gaap_ServicingAssetAtAmortizedValue / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember	$ 2,066us-gaap_ServicingAssetAtAmortizedValue / us-gaap_ParticipatingMortgageLoansAxis = fmb_MortgageServicingRightsMember

X

- Definition

Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7524895&loc=d3e120260-111741



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

+ Details

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

X

- Definition

Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

+ Details

Name:	us-gaap_ServicingAssetAtAmortizedValueAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

+ Details

Name:	us-gaap_ServicingAssetAtAmortizedValueAmortization1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of valuation allowance applied to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 4

-Subparagraph (a)(5)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746

+ Details

Name:	us-gaap_ServicingAssetAtAmortizedValueValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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

X

- Details

Name:	us-gaap_ParticipatingMortgageLoansAxis=fmb_MortgageServicingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: