XML 40 R16.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Fair Value of Instruments (Details 2) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2012 | Dec. 31, 2011
Impaired loans and other real estate |  |
Change in fair value of assets and liabilities | $ (443) | $ (928)
Fair Value, Measurements, Nonrecurring [Member] | Impaired loans [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value on a nonrecurring basis, total | 4,516 | 1,854
Change in fair value of assets and liabilities | (72) | (150)
Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned - residential mortgages [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value on a nonrecurring basis, total | 865 | 958
Change in fair value of assets and liabilities | (25) | (145)
Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned - commercial [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value on a nonrecurring basis, total | 2,253 | 2,614
Change in fair value of assets and liabilities | (346) | (633)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired loans [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned - residential mortgages [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned - commercial [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value |  |
Significant Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired loans [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value |  |
Significant Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned - residential mortgages [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value |  |
Significant Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned - commercial [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value |  |
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired loans [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value | 4,516 | 1,854
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned - residential mortgages [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value | 865 | 958
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other real estate owned - commercial [Member] |  |
Impaired loans and other real estate |  |
Assets measured at fair value | $ 2,253 | $ 2,614

X
- Definition Assets measured at fair value. + References No definition available. + Details
Name: | fmao_AssetsMeasuredAtFairValue
Namespace Prefix: | fmao_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Change in fair value of assets and liabilities. + References No definition available. + Details
Name: | fmao_ChangeInFairValueOfAssetsAndLiabilities
Namespace Prefix: | fmao_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration