XML 64 R54.htm IDEA: XBRL DOCUMENT
v3.25.2

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Payment Status (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | $ 96,220 | $ 32,810
Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 87,177 | 29,071
30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 3,407 | 752
60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 860 | 1,799
90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 4,776 | 1,188
Commercial and industrial loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 17,966 | 6,275
Commercial and industrial loans | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 14,186 | 6,150
Commercial and industrial loans | 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 2,831 | 125
Commercial and industrial loans | 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 448 | 0
Commercial and industrial loans | 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 501 | 0
Agricultural land, production and other loans to farmers |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 2,194 |
Agricultural land, production and other loans to farmers | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 2,194 |
Agricultural land, production and other loans to farmers | 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 |
Agricultural land, production and other loans to farmers | 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 |
Agricultural land, production and other loans to farmers | 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 |
Construction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 6,425 |
Construction | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 6,425 |
Construction | 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 |
Construction | 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 |
Construction | 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 |
Commercial real estate, non-owner occupied |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 58,364 | 21,287
Commercial real estate, non-owner occupied | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 58,364 | 19,488
Commercial real estate, non-owner occupied | 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 | 0
Commercial real estate, non-owner occupied | 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 | 1,799
Commercial real estate, non-owner occupied | 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 | 0
Commercial real estate, owner occupied |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 5,726 | 1,990
Commercial real estate, owner occupied | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 2,153 | 1,990
Commercial real estate, owner occupied | 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 | 0
Commercial real estate, owner occupied | 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 | 0
Commercial real estate, owner occupied | 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 3,573 | 0
Residential |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 5,407 | 2,945
Residential | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 3,717 | 1,219
Residential | 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 576 | 538
Residential | 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 412 | 0
Residential | 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 702 | 1,188
Home equity |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 138 | 313
Home equity | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 138 | 224
Home equity | 30-59 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 | 89
Home equity | 60-89 Days Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | 0 | 0
Home equity | 90 Days or More Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loan Modifications Made to Borrowers Experiencing Financial Difficulty | $ 0 | $ 0

X
- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-34 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-33 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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: |