XML 76 R71.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Allowance for Loan and Lease Losses (Allocation of Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | $ 768,391 | $ 960,457 | $ 1,175,441 |
Non-PCI impaired loans less than $500,00 collectively evaluated | 41,000 | 47,100 |  |
Non-PCI Loans |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 200,599 | 163,902 |  |
ALLL for loans and leases individually evaluated for impairment | 12,915 | 9,827 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 133,358 | 115,073 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 52,241 | 31,357 |  |
Financing Receivable, Individually Evaluated for Impairment | 185,599 | 146,430 |  |
Average balance | 169,938 | 153,123 | 141,733 |
Interest income recognized | 5,410 | 5,488 | 4,790 |
Allowance for loan and lease losses | 217,605 | 214,568 | 211,867 | $ 205,026
Non-PCI Loans | Commercial |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 95,927 | 79,865 |  |
ALLL for loans and leases individually evaluated for impairment | 5,634 | 4,445 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 52,516 | 43,686 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 36,377 | 24,955 |  |
Financing Receivable, Individually Evaluated for Impairment | 88,893 | 68,641 |  |
Average balance | 81,477 | 78,597 | 88,341 |
Interest income recognized | 2,761 | 3,063 | 3,116 |
Non-PCI Loans | Commercial | Other commercial real estate |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 1,360 | 946 |  |
ALLL for loans and leases individually evaluated for impairment | 39 | 42 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 318 | 243 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 950 | 617 |  |
Financing Receivable, Individually Evaluated for Impairment | 1,268 | 860 |  |
Average balance | 919 | 1,225 | 1,642 |
Interest income recognized | 27 | 43 | 34 |
Allowance for loan and lease losses | 2,211 | 2,481 | 4,571 | 3,269
Non-PCI Loans | Commercial | Construction and land development |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 5,109 | 2,606 |  |
ALLL for loans and leases individually evaluated for impairment | 463 | 490 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 1,851 | 1,897 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,804 | 278 |  |
Financing Receivable, Individually Evaluated for Impairment | 4,655 | 2,175 |  |
Average balance | 3,915 | 1,734 | 858 |
Interest income recognized | 53 | 84 | 37 |
Allowance for loan and lease losses | 33,213 | 35,270 | 24,470 | 28,877
Non-PCI Loans | Commercial | Mortgage |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 74,804 | 61,317 |  |
ALLL for loans and leases individually evaluated for impairment | 3,650 | 2,671 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 42,394 | 34,177 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 27,755 | 21,270 |  |
Financing Receivable, Individually Evaluated for Impairment | 70,149 | 55,447 |  |
Average balance | 64,363 | 65,943 | 73,815 |
Interest income recognized | 2,188 | 2,569 | 2,596 |
Allowance for loan and lease losses | 45,335 | 43,451 | 45,005 | 48,278
Non-PCI Loans | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 13,993 | 14,695 |  |
ALLL for loans and leases individually evaluated for impairment | 1,379 | 1,137 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 7,547 | 7,153 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 4,635 | 2,715 |  |
Financing Receivable, Individually Evaluated for Impairment | 12,182 | 9,868 |  |
Average balance | 11,884 | 9,560 | 11,600 |
Interest income recognized | 482 | 364 | 427 |
Allowance for loan and lease losses | 59,374 | 55,620 | 59,824 | 56,132
Non-PCI Loans | Commercial | Other |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 661 | 301 |  |
ALLL for loans and leases individually evaluated for impairment | 103 | 105 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 406 | 216 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 233 | 75 |  |
Financing Receivable, Individually Evaluated for Impairment | 639 | 291 |  |
Average balance | 396 | 135 | 426 |
Interest income recognized | 11 | 3 | 22 |
Allowance for loan and lease losses | 2,236 | 2,221 | 4,689 | 3,127
Non-PCI Loans | Noncommercial |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 104,672 | 84,037 |  |
ALLL for loans and leases individually evaluated for impairment | 7,281 | 5,382 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 80,842 | 71,387 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 15,864 | 6,402 |  |
Financing Receivable, Individually Evaluated for Impairment | 96,706 | 77,789 |  |
Average balance | 88,461 | 74,526 | 53,392 |
Interest income recognized | 2,649 | 2,425 | 1,674 |
Non-PCI Loans | Noncommercial | Construction and land development |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 4,150 | 4,035 |  |
ALLL for loans and leases individually evaluated for impairment | 174 | 81 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 2,470 | 2,337 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 1,412 | 1,412 |  |
Financing Receivable, Individually Evaluated for Impairment | 3,882 | 3,749 |  |
Average balance | 3,589 | 3,677 | 3,383 |
Interest income recognized | 116 | 172 | 145 |
Allowance for loan and lease losses | 2,709 | 2,350 | 3,962 | 1,596
Non-PCI Loans | Noncommercial | Mortgage |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 64,741 | 45,226 |  |
ALLL for loans and leases individually evaluated for impairment | 3,278 | 1,901 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 48,796 | 40,359 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 11,646 | 1,809 |  |
Financing Receivable, Individually Evaluated for Impairment | 60,442 | 42,168 |  |
Average balance | 52,045 | 41,368 | 33,818 |
Interest income recognized | 1,386 | 1,237 | 990 |
Allowance for loan and lease losses | 18,232 | 15,472 | 15,706 | 14,447
Non-PCI Loans | Noncommercial | Revolving mortgage |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 31,960 | 31,371 |  |
ALLL for loans and leases individually evaluated for impairment | 2,722 | 2,515 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 26,104 | 25,751 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,765 | 3,101 |  |
Financing Receivable, Individually Evaluated for Impairment | 28,869 | 28,852 |  |
Average balance | 29,516 | 26,759 | 14,022 |
Interest income recognized | 1,009 | 900 | 436 |
Allowance for loan and lease losses | 19,702 | 21,862 | 22,436 | 21,013
Non-PCI Loans | Noncommercial | Consumer |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Unpaid principal balance | 3,821 | 3,405 |  |
ALLL for loans and leases individually evaluated for impairment | 1,107 | 885 |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 3,472 | 2,940 |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 41 | 80 |  |
Financing Receivable, Individually Evaluated for Impairment | 3,513 | 3,020 |  |
Average balance | 3,311 | 2,722 | 2,169 |
Interest income recognized | 138 | 116 | 103 |
Allowance for loan and lease losses | 34,593 | 35,841 | 31,204 | 28,287
PCI Loans |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Acquired loans which have adverse change in expected cash flows | 139,400 | 186,600 |  |
Allowance for loan and lease losses | $ 7,536 | $ 9,144 | $ 10,026 | $ 13,769

X
- Definition Acquired Loans Which Have Adverse Change In Expected Cash Flows + References No definition available. + Details
Name: | fcnca_AcquiredLoansWhichHaveAdverseChangeInExpectedCashFlows
Namespace Prefix: | fcnca_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The recorded investment of impaired financing receivables less than $500,000 that are collectively evaluated. + References No definition available. + Details
Name: | fcnca_ImpairedFinancingReceivableCollectivelyEvaluated
Namespace Prefix: | fcnca_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | fcnca_LoanDesignationAxis=fcnca_NonPCILoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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