XML 49 R34.htm IDEA: XBRL DOCUMENT v2.4.0.8

Loans - Loans Individually Evaluated for Impairment by Portfolio Segment of Loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 26	$ 470	$ 26	$ 470
Unpaid Principal Balance	26	542	26	542
Related Allowance	0	38	0	38
Average Recorded Investment	78	313	171	252
Interest Income Recognized	2	0	3	0
Agricultural Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	141	88	141	88
Unpaid Principal Balance	141	88	141	88
Related Allowance	0	15	0	15
Average Recorded Investment	141	111	141	55
Interest Income Recognized	0	0	0	0
Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0	0
Unpaid Principal Balance	0	0	0	0
Related Allowance	0	0	0	0
Average Recorded Investment	0	0	0	0
Interest Income Recognized	0	0	0	0
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,277	1,035	1,277	1,035
Unpaid Principal Balance	1,277	1,459	1,277	1,459
Related Allowance	0	0	0	0
Average Recorded Investment	845	1,053	921	954
Interest Income Recognized	14	0	28	0
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	345	2,928	345	2,928
Unpaid Principal Balance	345	2,928	345	2,928
Related Allowance	202	718	202	718
Average Recorded Investment	864	2,968	857	2,998
Interest Income Recognized	16	0	45	0
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0	0
Unpaid Principal Balance	0	3	0	3
Related Allowance	0	0	0	0
Average Recorded Investment	0	0	0	0
Interest Income Recognized	0	0	0	0
With no related allowance recorded [Member] | Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	26	359	26	359
Unpaid Principal Balance	26	431	26	431
Related Allowance	0	0	0	0
Average Recorded Investment	23	202	44	131
Interest Income Recognized	1	0	1	0
With no related allowance recorded [Member] | Agricultural Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	141	0	141	0
Unpaid Principal Balance	141	0	141	0
Related Allowance	0	0	0	0
Average Recorded Investment	141	0	141	0
Interest Income Recognized	0	0	0	0
With no related allowance recorded [Member] | Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0	0
Unpaid Principal Balance	0	0	0	0
Related Allowance	0	0	0	0
Average Recorded Investment	0	0	0	0
Interest Income Recognized	0	0	0	0
With no related allowance recorded [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,277	1,035	1,277	1,035
Unpaid Principal Balance	1,277	1,459	1,277	1,459
Related Allowance	0	0	0	0
Average Recorded Investment	845	1,038	874	622
Interest Income Recognized	14	0	28	0
With no related allowance recorded [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	309	0	309
Unpaid Principal Balance	0	309	0	309
Related Allowance	0	0	0	0
Average Recorded Investment	354	309	181	297
Interest Income Recognized	14	0	40	0
With no related allowance recorded [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0	0
Unpaid Principal Balance	0	3	0	3
Related Allowance	0	0	0	0
Average Recorded Investment	0	0	0	0
Interest Income Recognized	0	0	0	0
With a specific allowance recorded [Member] | Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	111	0	111
Unpaid Principal Balance	0	111	0	111
Related Allowance	0	38	0	38
Average Recorded Investment	55	111	127	121
Interest Income Recognized	1	0	2	0
With a specific allowance recorded [Member] | Agricultural Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	88	0	88
Unpaid Principal Balance	0	88	0	88
Related Allowance	0	15	0	15
Average Recorded Investment	0	111	0	55
Interest Income Recognized	0	0	0	0
With a specific allowance recorded [Member] | Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0	0
Unpaid Principal Balance	0	0	0	0
Related Allowance	0	0	0	0
Average Recorded Investment	0	0	0	0
Interest Income Recognized	0	0	0	0
With a specific allowance recorded [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0	0
Unpaid Principal Balance	0	0	0	0
Related Allowance	0	0	0	0
Average Recorded Investment	0	15	47	332
Interest Income Recognized	0	0	0	0
With a specific allowance recorded [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	345	2,619	345	2,619
Unpaid Principal Balance	345	2,619	345	2,619
Related Allowance	202	718	202	718
Average Recorded Investment	510	2,659	676	2,701
Interest Income Recognized	2	0	5	0
With a specific allowance recorded [Member] | Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0	0
Unpaid Principal Balance	0	0	0	0
Related Allowance	0	0	0	0
Average Recorded Investment	0	0	0	0
Interest Income Recognized	$ 0	$ 0	$ 0	$ 0

X

- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

No definition available.

+ Details

Name:	fmao_FinancingReceivableAverageRecordedInvestment
Namespace Prefix:	fmao_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Impaired Financing Receivable Recorded Investment During Period

+ References

No definition available.

+ Details

Name:	fmao_ImpairedFinancingReceivableRecordedInvestmentDuringPeriod
Namespace Prefix:	fmao_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Impaired Financing Receivable Related Allowance During Period

+ References

No definition available.

+ Details

Name:	fmao_ImpairedFinancingReceivableRelatedAllowanceDuringPeriod
Namespace Prefix:	fmao_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Impaired Financing Receivables Interest Income Recognized

+ References

No definition available.

+ Details

Name:	fmao_ImpairedFinancingReceivablesInterestIncomeRecognized
Namespace Prefix:	fmao_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Impaired Financing Receivable Unpaid Principal Balance During Period

+ References

No definition available.

+ Details

Name:	fmao_ImpairedFinancingReceivableUnpaidPrincipalBalanceDuringPeriod
Namespace Prefix:	fmao_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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