XML 61 R52.htm IDEA: XBRL DOCUMENT
v3.22.1

Loans and Allowance - Schedule of Modified Loans (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 USD ($) loan | Mar. 31, 2021 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Loans | loan | 1,000 | 7
Recorded Balance | $ | $ 27 | $ 290
Commercial real estate, owner occupied |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Loans | loan | 1,000 |
Recorded Balance | $ | $ 27 |
Residential |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Loans | loan |  | 5
Recorded Balance | $ |  | $ 197
Home equity |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Loans | loan |  | 1
Recorded Balance | $ |  | $ 91
Individuals' loans for household and other personal expenditures |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Loans | loan |  | 1
Recorded Balance | $ |  | $ 2

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=frme_CommercialRealEstateOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |