XML 13 R54.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Allowance for Loan and Lease Losses (Troubled Debt Restructuring) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | $ 131,466 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | $ 135,963 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 25,525 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 15,516 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 156,991 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 151,479 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 66,046 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 44,005 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Non-PCI Loans | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 86,884 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 91,316 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Nonaccruing | 23,526 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 13,291 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Financing Receivable, Modifications, Recorded Investment | 110,410 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 104,607 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
PCI Loans | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 44,582 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_LoansAcquiredWithDeterioratedCreditQualityMember | 44,647 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_LoansAcquiredWithDeterioratedCreditQualityMember
Nonaccruing | 1,999 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_LoansAcquiredWithDeterioratedCreditQualityMember | 2,225 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_LoansAcquiredWithDeterioratedCreditQualityMember
Financing Receivable, Modifications, Recorded Investment | 46,581 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_LoansAcquiredWithDeterioratedCreditQualityMember | 46,872 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember / fcnca_LoanDesignationAxis = fcnca_LoansAcquiredWithDeterioratedCreditQualityMember
Commercial | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 104,848 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 107,305 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 17,336 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 10,861 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 122,184 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 118,166 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Commercial | Construction and land development | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 3,425 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 2,591 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 490 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 446 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 3,915 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 3,037 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Commercial | Construction and land development | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 1,497 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 343 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateConstructionFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Commercial | Mortgage | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 88,889 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 92,184 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 11,326 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 8,937 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 100,215 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 101,121 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Commercial | Mortgage | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 26,058 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 24,720 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Commercial | Other commercial real estate | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 2,123 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateOtherReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 2,374 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateOtherReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 423 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateOtherReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 449 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateOtherReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 2,546 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateOtherReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 2,823 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateOtherReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Commercial | Other commercial real estate | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 650 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateOtherReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 619 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_CommercialRealEstateOtherReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Commercial | Commercial and industrial | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 9,248 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 9,864 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 4,768 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 664 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 14,016 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 10,528 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Commercial | Commercial and industrial | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 5,691 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 1,741 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Commercial | Lease financing | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 1,163 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_FinanceLeasesFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 258 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_FinanceLeasesFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 329 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_FinanceLeasesFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 365 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_FinanceLeasesFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 1,492 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_FinanceLeasesFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 623 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_FinanceLeasesFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Commercial | Lease financing | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 346 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_FinanceLeasesFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 374 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_FinanceLeasesFinancingReceivableMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Commercial | Other | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 0 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 34 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 0 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 34 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Noncommerical | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 26,618 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 28,658 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 8,189 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 4,655 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 34,807 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 33,313 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Noncommerical | Mortgage | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 23,060 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 22,597 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 5,097 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 4,655 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 28,157 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 27,252 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Noncommerical | Mortgage | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 19,238 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 14,242 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_MortgageReceivablesMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Noncommerical | Other | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 2,052 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 1,966 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Noncommerical | Construction and land development | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 733 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConstructionAndLandDevelopmentNoncommercialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 1,391 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConstructionAndLandDevelopmentNoncommercialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConstructionAndLandDevelopmentNoncommercialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConstructionAndLandDevelopmentNoncommercialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 733 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConstructionAndLandDevelopmentNoncommercialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 1,391 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConstructionAndLandDevelopmentNoncommercialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Noncommerical | Construction and land development | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConstructionAndLandDevelopmentNoncommercialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConstructionAndLandDevelopmentNoncommercialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Noncommerical | Revolving mortgage | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 1,871 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 3,675 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 1,112 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | 2,983 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 3,675 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Noncommerical | Revolving mortgage | Non-PCI Loans |  |
Financing Receivable, Modifications [Line Items] |  |
Nonaccruing | 9,837 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / fcnca_LoanDesignationAxis = fcnca_NonPCILoansMember
Noncommerical | Consumer and Other | TDRs |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing | 954 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConsumerAndOtherMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 995 fcnca_FinancingReceivableRecordedInvestmentStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConsumerAndOtherMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Nonaccruing | 1,980 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConsumerAndOtherMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | 0 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConsumerAndOtherMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember
Financing Receivable, Modifications, Recorded Investment | $ 2,934 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConsumerAndOtherMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember | $ 995 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = fcnca_ConsumerAndOtherMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcnca_NoncommercialSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcnca_TroubledDebtRestructuringMember

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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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