XML 118 R101.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Employee Benefit Plans (Present Value of Accrued Liability) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | May 01, 2019 | Apr. 02, 2019 | Oct. 02, 2018
Present Value Of Accrued Liability [Roll Forward] |  |  |  |  |  |
Benefit expense and interest cost | $ (1,582) | $ 4,572 | $ 7,255 |  |  |
Interest cost | $ 37,260 | $ 34,733 | 35,593 |  |  |
Discount rate | 3.46% | 4.38% |  |  |  |
Executives Directors And Officer Of Acquired Entities |  |  |  |  |  |
Present Value Of Accrued Liability [Roll Forward] |  |  |  |  |  |
Present value of accrued liability as of January 1 | $ 34,063 | $ 37,299 |  |  |  |
Benefit expense and interest cost | 3,970 | 535 |  |  |  |
Benefits paid | 4,681 | 4,579 |  |  |  |
Present value of accrued liability as of December 31 | 45,295 | 34,063 | $ 37,299 |  |  |
Biscayne Bancshares |  |  |  |  |  |
Present Value Of Accrued Liability [Roll Forward] |  |  |  |  |  |
Liability assumed | 1,138 | 0 |  |  | $ 956,756 |
First South Bancorp |  |  |  |  |  |
Present Value Of Accrued Liability [Roll Forward] |  |  |  |  |  |
Liability assumed | 1,067 | 0 |  | $ 215,561 |  |
Entegra |  |  |  |  |  |
Present Value Of Accrued Liability [Roll Forward] |  |  |  |  |  |
Liability assumed | 9,738 | 0 |  |  |  |
Capital Commerce Bancorp |  |  |  |  |  |
Present Value Of Accrued Liability [Roll Forward] |  |  |  |  |  |
Liability assumed | $ 0 | $ 808 |  |  |  | $ 204,500

X
- Definition Defined Benefit Plan, Present Value Of Accrued Liability + References No definition available. + Details
Name: | fcnca_DefinedBenefitPlanPresentValueOfAccruedLiability
Namespace Prefix: | fcnca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present Value Of Accrued Liabilitiy [Roll Forward] + References No definition available. + Details
Name: | fcnca_PresentValueOfAccruedLiabilitiyRollForward
Namespace Prefix: | fcnca_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of distribution made to individual in accordance with deferred compensation arrangement. + References No definition available. + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualDistributionPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cost recognized for passage of time related to defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanInterestCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=fcnca_ExecutivesDirectorsAndOfficerOfAcquiredEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fcnca_BiscayneBancsharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fcnca_FirstSouthBancorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fcnca_EntegraMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fcnca_CapitalCommerceBancorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |