XML 118 R90.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Loans and Allowance for Credit Losses - Troubled Debt Restructured Loans and Commitments (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
Financing Receivable, Impaired [Line Items] |  |  |
Accrual status | $ 13,037 | $ 20,276 | $ 1,336
Nonaccrual status | 50,979 | 44,841 | 31,410
Total | 64,016 | 65,117 | 32,746
Letters of credit | 1,574 | 12,580 | 11,321
Unused lines of credit | 0 | 42 | 1,095
Total | $ 1,574 | $ 12,622 | $ 12,416

X
- Definition Total commitments. + References No definition available. + Details
Name: | fcf_CommitmentsNet
Namespace Prefix: | fcf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivable troubled debt restructured loans accrual status. + References No definition available. + Details
Name: | fcf_FinancingReceivableTroubledDebtRestructuredLoansAccrualStatus
Namespace Prefix: | fcf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financing receivable troubled debt restructured loans non-accrual status. + References No definition available. + Details
Name: | fcf_FinancingReceivableTroubledDebtRestructuredLoansNonaccrualStatus
Namespace Prefix: | fcf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Troubled debt restructuring loans. + References No definition available. + Details
Name: | fcf_TroubledDebtRestructuringLoans
Namespace Prefix: | fcf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total amount of unused lines of credit associated with troubled debt restructured loans as of the reporting date. + References No definition available. + Details
Name: | fcf_UnusedLineOfCreditTroubledDebtRestructured
Namespace Prefix: | fcf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant