XML 64 R16.htm IDEA: XBRL DOCUMENT
v2.4.0.8

FAIR VALUE OF INSTRUMENTS - Financial Assets Measured at Fair Value on a Recurring Basis (Detail) (Fair Value on a Recurring Basis [Member], USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Level 1 [Member] |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |
Total Securities Available for Sale | $ 25,479 | $ 10,568
Level 1 [Member] | U.S. Treasury [Member] |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |
Total Securities Available for Sale | 25,479 | 10,568
Level 2 [Member] |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |
Total Securities Available for Sale | 316,571 | 328,929
Level 2 [Member] | U.S. Government agency [Member] |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |
Total Securities Available for Sale | 210,915 | 220,200
Level 2 [Member] | Mortgage-backed securities [Member] |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |
Total Securities Available for Sale | 45,338 | 53,006
Level 2 [Member] | State and local governments [Member] |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |
Total Securities Available for Sale | 60,318 | 55,723
Level 3 [Member] |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |
Total Securities Available for Sale | 12,424 | 16,408
Level 3 [Member] | State and local governments [Member] |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |
Total Securities Available for Sale | $ 12,424 | $ 16,408

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

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant