XML 70 R65.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Loans - Summary of Activities in Allowance for Credit Losses (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Allowance for Loan Losses |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | $ 5,194 us-gaap_LoansAndLeasesReceivableAllowance |  |  |  | $ 5,224 us-gaap_LoansAndLeasesReceivableAllowance | $ 5,194 us-gaap_LoansAndLeasesReceivableAllowance | $ 5,224 us-gaap_LoansAndLeasesReceivableAllowance | $ 5,091 us-gaap_LoansAndLeasesReceivableAllowance
Provision for loan loss | 37 us-gaap_ProvisionForLoanAndLeaseLosses | 282 us-gaap_ProvisionForLoanAndLeaseLosses | 444 us-gaap_ProvisionForLoanAndLeaseLosses | 428 us-gaap_ProvisionForLoanAndLeaseLosses | 276 us-gaap_ProvisionForLoanAndLeaseLosses | 303 us-gaap_ProvisionForLoanAndLeaseLosses | 112 us-gaap_ProvisionForLoanAndLeaseLosses | 167 us-gaap_ProvisionForLoanAndLeaseLosses | 1,191 us-gaap_ProvisionForLoanAndLeaseLosses | 858 us-gaap_ProvisionForLoanAndLeaseLosses | 738 us-gaap_ProvisionForLoanAndLeaseLosses
Loans charged off |  |  |  |  |  |  |  |  | (778)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs | (1,262)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs | (891)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Recoveries |  |  |  |  |  |  |  |  | 298 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts | 374 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts | 286 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Balance at ending of year | 5,905 us-gaap_LoansAndLeasesReceivableAllowance |  |  |  | 5,194 us-gaap_LoansAndLeasesReceivableAllowance |  |  |  | 5,905 us-gaap_LoansAndLeasesReceivableAllowance | 5,194 us-gaap_LoansAndLeasesReceivableAllowance | 5,224 us-gaap_LoansAndLeasesReceivableAllowance
Allowance for Unfunded Loan Commitments & Letters of Credit | 207 fmb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit |  |  |  | 163 fmb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit |  |  |  | 207 fmb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit | 163 fmb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit | 162 fmb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit
Total Allowance for Credit Losses | $ 6,112 us-gaap_FinancingReceivableAllowanceForCreditLosses |  |  |  | $ 5,357 us-gaap_FinancingReceivableAllowanceForCreditLosses |  |  |  | $ 6,112 us-gaap_FinancingReceivableAllowanceForCreditLosses | $ 5,357 us-gaap_FinancingReceivableAllowanceForCreditLosses | $ 5,386 us-gaap_FinancingReceivableAllowanceForCreditLosses

X
- Definition Allowance is intended to reflect the potential for losses that may not be funded but for which the bank has made a commitment to fund including letters of credit. + References No definition available. + Details
Name: | fmb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit
Namespace Prefix: | fmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
Name: | us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration