XML 36 R29.htm IDEA: XBRL DOCUMENT
v2.4.0.8

LOANS - Impaired Loans Classified as Troubled Debt Restructured (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 Contract | Sep. 30, 2012 Contract | Sep. 30, 2013 Contract | Sep. 30, 2012 Contract
Commercial Real Estate [Member] |  |  |  |
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items] |  |  |  |
Number of Contracts Modified, Troubled Debt Restructurings |  |  |  | 1
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 1,937
Post- Modification Outstanding Recorded Investment |  |  |  | 1,937
Number of Contracts Modified, Troubled Debt Restructurings That Subsequently Defaulted |  |  |  |
Recorded Investment |  |  |  |
Agricultural Real Estate [Member] |  |  |  |
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items] |  |  |  |
Number of Contracts Modified, Troubled Debt Restructurings |  |  |  |
Pre- Modification Outstanding Recorded Investment |  |  |  |
Post- Modification Outstanding Recorded Investment |  |  |  |
Number of Contracts Modified, Troubled Debt Restructurings That Subsequently Defaulted |  |  |  |
Recorded Investment |  |  |  |
Commercial and Industrial [Member] |  |  |  |
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items] |  |  |  |
Number of Contracts Modified, Troubled Debt Restructurings |  | 2 | 1 | 2
Pre- Modification Outstanding Recorded Investment |  | 420 | 81 | 420
Post- Modification Outstanding Recorded Investment |  | 420 | 43 | 420
Number of Contracts Modified, Troubled Debt Restructurings That Subsequently Defaulted |  |  |  |
Recorded Investment |  |  |  |

X
- Definition Financing Receivable Modifications Post Modification Recorded Investment One + References No definition available. + Details
Name: | fmao_FinancingReceivableModificationsPostModificationRecordedInvestmentOne
Namespace Prefix: | fmao_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing Receivable Modifications Pre Modification Recorded Investment One + References No definition available. + Details
Name: | fmao_FinancingReceivableModificationsPreModificationRecordedInvestmentOne
Namespace Prefix: | fmao_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | fmao_ScheduleOfFinancingReceivableTroubledDebtRestructuringsLineItems
Namespace Prefix: | fmao_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953682-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953682-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration