XML 50 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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 165	$ 524	$ 165	$ 524
Unpaid Principal Balance	165	596	165	596
Related Allowance	49	114	49	114
Average Recorded Investment	138	497	160	334
Interest Income Recognized	1	7	25	11
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	9	0	9
Average Recorded Investment	94	88	125	66
Interest Income Recognized	7	0	8	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	709	571	709	571
Unpaid Principal Balance	709	818	709	818
Related Allowance	0	219	0	219
Average Recorded Investment	739	878	861	929
Interest Income Recognized	0	0	9	0
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	812	378	812	378
Unpaid Principal Balance	812	378	812	378
Related Allowance	203	81	203	81
Average Recorded Investment	817	416	843	2,138
Interest Income Recognized	7	0	7	1
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
With no related allowance recorded [Member] | Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	26	152	26	152
Unpaid Principal Balance	26	224	26	224
Related Allowance	0	0	0	0
Average Recorded Investment	26	224	38	162
Interest Income Recognized	0	6	1	7
With no related allowance recorded [Member] | Agricultural 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	94	0	125	0
Interest Income Recognized	7	0	8	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	709	101	709	101
Unpaid Principal Balance	709	101	709	101
Related Allowance	0	0	0	0
Average Recorded Investment	739	364	829	536
Interest Income Recognized	0	0	9	0
With no related allowance recorded [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	474	0	474	0
Unpaid Principal Balance	474	0	474	0
Related Allowance	0	0	0	0
Average Recorded Investment	476	0	279	198
Interest Income Recognized	7	0	7	0
With no related 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
With a specific allowance recorded [Member] | Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	139	372	139	372
Unpaid Principal Balance	139	372	139	372
Related Allowance	49	114	49	114
Average Recorded Investment	112	273	0	172
Interest Income Recognized	1	1	24	4
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	9	0	9
Average Recorded Investment	0	88	0	66
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	470	0	470
Unpaid Principal Balance	0	717	0	717
Related Allowance	0	219	0	219
Average Recorded Investment	0	514	32	393
Interest Income Recognized	0	0	0	0
With a specific allowance recorded [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	338	378	338	378
Unpaid Principal Balance	338	378	338	378
Related Allowance	203	81	203	81
Average Recorded Investment	341	416	564	1,940
Interest Income Recognized	0	0	0	1
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