XML 11 R76.htm IDEA: XBRL DOCUMENT
v3.19.3

Accumulated Other Comprehensive Income (Loss) (Components of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Jan. 01, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Amounts reclassified from accumulated other comprehensive loss |  | $ 5,933 | $ 7,698 | $ 14,926 | $ 16,526 |
Net current period other comprehensive income |  | 8,959 | (2,937) | 63,415 | (75,230) |
Unrealized Losses on Investment Securities Available for Sale |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Beginning balance | [1] | 2,554 | (57,496) | (38,505) | (30,945) |
Cumulative effect of new accounting principle in period of adoption | [1],[2] |  |  |  |  | $ (29,751)
Adjusted beginning balance | [1] |  |  |  |  | (60,696)
Net unrealized gains arising during period | [1] | 3,026 | (10,635) | 48,489 | (7,435) |
Amounts reclassified from accumulated other comprehensive loss | [1] | (874) | 0 | (5,278) | 0 |
Net current period other comprehensive income | [1] | 2,152 | (10,635) | 43,211 | (7,435) |
Ending balance | [1] | 4,706 | (68,131) | 4,706 | (68,131) |
Unrealized Losses On Securities Available For Sale Transferred To Held To Maturity |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Beginning balance | [1] | (61,979) | (80,876) | (71,149) | 0 |
Cumulative effect of new accounting principle in period of adoption | [1],[2] |  |  |  |  | 0
Adjusted beginning balance | [1] |  |  |  |  | 0
Net unrealized gains arising during period | [1] | 0 | 0 | 0 | (84,321) |
Amounts reclassified from accumulated other comprehensive loss | [1] | 4,693 | 5,007 | 13,863 | 8,452 |
Net current period other comprehensive income | [1] | 4,693 | 5,007 | 13,863 | (75,869) |
Ending balance | [1] | (57,286) | (75,869) | (57,286) | (75,869) |
Defined Benefit Pension Items |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Beginning balance | [1] | (121,306) | (106,266) | (125,533) | (91,349) |
Cumulative effect of new accounting principle in period of adoption | [1],[2] |  |  |  |  | (20,300)
Adjusted beginning balance | [1] |  |  |  |  | (111,649)
Net unrealized gains arising during period | [1] | 0 | 0 | 0 | 0 |
Amounts reclassified from accumulated other comprehensive loss | [1] | 2,114 | 2,691 | 6,341 | 8,074 |
Net current period other comprehensive income | [1] | 2,114 | 2,691 | 6,341 | 8,074 |
Ending balance | [1] | (119,192) | (103,575) | (119,192) | (103,575) |
Accumulated Other Comprehensive (Loss) Income |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Beginning balance |  | (180,731) | (244,638) | (235,187) | (122,294) |
Cumulative effect of new accounting principle in period of adoption | [2] |  |  |  |  | (50,051)
Adjusted beginning balance |  |  |  |  |  | $ (172,345)
Net unrealized gains arising during period |  | 3,026 | (10,635) | 48,489 | (91,756) |
Amounts reclassified from accumulated other comprehensive loss |  | 5,933 | 7,698 | 14,926 | 16,526 |
Net current period other comprehensive income |  | 8,959 | (2,937) | 63,415 | (75,230) |
Ending balance |  | $ (171,772) | $ (247,575) | $ (171,772) | $ (247,575) |
[1] | All amounts are net of tax. Amounts in parentheses indicate debits.
[2] | (2) Cumulative adjustments for adoption of ASU 2018-02 of $31.3 million and ASU 2016-01 of $18.7 million.

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_AccumulatedOtherComprehensiveIncomeLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109228884&loc=d3e1436-108581 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109228884&loc=d3e1436-108581 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17B -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL34724394-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109228884&loc=d3e1436-108581 + Details
Name: | us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4I -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4590271-111686 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683 + Details
Name: | us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of stockholders' equity including the portion attributable to noncontrolling interests, after the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=fcnca_AccumulatedNetUnrealizedLossOnSecuritiesAvailableForSaleTransferredToHeldToMaturityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedOtherComprehensiveIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |