XML 75 R60.htm IDEA: XBRL DOCUMENT
v3.24.3

Loans and Allowance for Credit Losses - Modified Payment Status (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | $ 17,794 | $ 10,471
Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 17,451 | 10,471
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 84 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 259 | 0
Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 795 | 758
Residential real estate [Member] | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 616 | 758
Residential real estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Residential real estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 84 | 0
Residential real estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 95 | 0
Residential real estate [Member] | Senior Lien |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 768 | 758
Residential real estate [Member] | Senior Lien | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 589 | 758
Residential real estate [Member] | Senior Lien | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Residential real estate [Member] | Senior Lien | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 84 | 0
Residential real estate [Member] | Senior Lien | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 95 | 0
Residential real estate [Member] | Junior Lien |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 27 |
Residential real estate [Member] | Junior Lien | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 27 |
Residential real estate [Member] | Junior Lien | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Residential real estate [Member] | Junior Lien | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Residential real estate [Member] | Junior Lien | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Commercial, financial, agricultural and other [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 7,293 | 50
Commercial, financial, agricultural and other [Member] | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 7,129 | 50
Commercial, financial, agricultural and other [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial, financial, agricultural and other [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial, financial, agricultural and other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 164 | 0
Commercial, financial, agricultural and other [Member] | Equipment Finance |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 164 |
Commercial, financial, agricultural and other [Member] | Equipment Finance | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Commercial, financial, agricultural and other [Member] | Equipment Finance | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Commercial, financial, agricultural and other [Member] | Equipment Finance | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Commercial, financial, agricultural and other [Member] | Equipment Finance | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 164 |
Commercial, financial, agricultural and other [Member] | Time and Demand Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 7,129 | 50
Commercial, financial, agricultural and other [Member] | Time and Demand Loans | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 7,129 | 50
Commercial, financial, agricultural and other [Member] | Time and Demand Loans | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial, financial, agricultural and other [Member] | Time and Demand Loans | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial, financial, agricultural and other [Member] | Time and Demand Loans | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial Real Estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 9,674 | 9,663
Commercial Real Estate [Member] | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 9,674 | 9,663
Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 9,674 | 9,663
Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 9,674 | 9,663
Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | 0
Commercial Real Estate [Member] | Owner Occupied Commercial Real Estate | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 | $ 0
Loans to individuals [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 32 |
Loans to individuals [Member] | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 32 |
Loans to individuals [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Loans to individuals [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Loans to individuals [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Loans to individuals [Member] | Automobile Loan |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 32 |
Loans to individuals [Member] | Automobile Loan | Financial Asset, Not Past Due |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 32 |
Loans to individuals [Member] | Automobile Loan | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Loans to individuals [Member] | Automobile Loan | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 0 |
Loans to individuals [Member] | Automobile Loan | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | $ 0 |

X
- Definition Financing Receivable, Modified in Period, Aging, Amount + References No definition available. + Details
Name: | fcf_FinancingReceivableModifiedInPeriodAgingAmount
Namespace Prefix: | fcf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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://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 2: 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 3: 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 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_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_SeniorLienMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_JuniorLienMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fcf_EquipmentFinanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fcf_TimeAndDemandLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fcf_OwnerOccupiedCommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_AutomobileLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |