XML 25 R22.htm IDEA: XBRL DOCUMENT v2.4.0.6

Loans (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Commercial Real Estate [Member]
Distribution of fixed rate loans and variable rate loans by major loan category
Distribution of fixed rate loans by major loan category, Fixed Rate	$ 114,221
Distribution of variable rate loans by major loan category, Variable Rate	95,380
Agricultural Real Estate [Member]
Distribution of fixed rate loans and variable rate loans by major loan category
Distribution of fixed rate loans by major loan category, Fixed Rate	26,672
Distribution of variable rate loans by major loan category, Variable Rate	9,226
Consumer real estate [Member]
Distribution of fixed rate loans and variable rate loans by major loan category
Distribution of fixed rate loans by major loan category, Fixed Rate	62,672
Distribution of variable rate loans by major loan category, Variable Rate	14,488
Commercial/Industrial [Member]
Distribution of fixed rate loans and variable rate loans by major loan category
Distribution of fixed rate loans by major loan category, Fixed Rate	67,170
Distribution of variable rate loans by major loan category, Variable Rate	22,609
Agricultural [Member]
Distribution of fixed rate loans and variable rate loans by major loan category
Distribution of fixed rate loans by major loan category, Fixed Rate	48,375
Distribution of variable rate loans by major loan category, Variable Rate	3,521
Consumer [Member]
Distribution of fixed rate loans and variable rate loans by major loan category
Distribution of fixed rate loans by major loan category, Fixed Rate	15,206
Distribution of variable rate loans by major loan category, Variable Rate	4,086
Industrial Development Bonds [Member]
Distribution of fixed rate loans and variable rate loans by major loan category
Distribution of fixed rate loans by major loan category, Fixed Rate	$ 1,202

X

- Details

Name:	fmao_DistributionOfFixedRateLoanAndVariableRateLoanByMajorLoanCategoryAbstract
Namespace Prefix:	fmao_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Reflects the carrying amount of loans charging borrowers fixed rates of interest.

+ References

No definition available.

+ Details

Name:	us-gaap_LoansReceivableWithFixedRatesOfInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Reflects the carrying amount of loans charging borrowers variable, or adjustable, rates of interest.

+ References

No definition available.

+ Details

Name:	us-gaap_LoansReceivableWithVariableRatesOfInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant