XML 25 R58.htm IDEA: XBRL DOCUMENT
v3.20.1

Loans and Allowance for Credit Losses - Troubled Debt Restructurings Identified During Period (Detail) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 USD ($) Contract | Mar. 31, 2019 USD ($) Contract
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Contracts | Contract | 12 | 12
Total Pre-Modification Outstanding Recorded Investment | $ 277 | $ 1,487
Post- Modification Outstanding Recorded Investment | 273 | 1,445
Troubled Debt Restructuring [Policy Text Block] | $ 0 | $ 40
Commercial, financial, agricultural and other [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Contracts | Contract | 0 | 1
Total Pre-Modification Outstanding Recorded Investment | $ 0 | $ 61
Post- Modification Outstanding Recorded Investment | 0 | 62
Troubled Debt Restructuring [Policy Text Block] | $ 0 | $ 0
Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Contracts | Contract | 2 | 6
Total Pre-Modification Outstanding Recorded Investment | $ 118 | $ 580
Post- Modification Outstanding Recorded Investment | 117 | 570
Troubled Debt Restructuring [Policy Text Block] | $ 0 | $ 40
Commercial Real Estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Contracts | Contract | 2 | 2
Total Pre-Modification Outstanding Recorded Investment | $ 12 | $ 798
Post- Modification Outstanding Recorded Investment | 12 | 767
Troubled Debt Restructuring [Policy Text Block] | $ 0 | $ 0
Loans to individuals [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number of Contracts | Contract | 8 | 3
Total Pre-Modification Outstanding Recorded Investment | $ 147 | $ 48
Post- Modification Outstanding Recorded Investment | 144 | 46
Troubled Debt Restructuring [Policy Text Block] | 0 | 0
Extended Maturity [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 17
Extended Maturity [Member] | Commercial, financial, agricultural and other [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 0
Extended Maturity [Member] | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 17
Extended Maturity [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 0
Extended Maturity [Member] | Loans to individuals [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 0
Contractual Interest Rate Reduction [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 18 | 605
Contractual Interest Rate Reduction [Member] | Commercial, financial, agricultural and other [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 0
Contractual Interest Rate Reduction [Member] | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 49
Contractual Interest Rate Reduction [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 556
Contractual Interest Rate Reduction [Member] | Loans to individuals [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 18 | 0
Contractual Payment Modification [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 259 | 865
Contractual Payment Modification [Member] | Commercial, financial, agricultural and other [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 0 | 61
Contractual Payment Modification [Member] | Residential real estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 118 | 514
Contractual Payment Modification [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | 12 | 242
Contractual Payment Modification [Member] | Loans to individuals [Member] |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Pre-Modification Outstanding Recorded Investment | $ 129 | $ 48

X
- Definition Financing Receivable Troubled Debt Restructuring Specific Reserve + References No definition available. + Details
Name: | fcf_FinancingReceivableTroubledDebtRestructuringSpecificReserve
Namespace Prefix: | fcf_
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 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 receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_ContractualInterestRateReductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=fcf_ContractualPaymentModificationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |