XML 115 R102.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Debt - Future Accretion Of The Valuation Discount (Details) - Subordinated Debt related to Trust Preferred Securities - Subordinated Debt $ in Thousands | Dec. 31, 2023 USD ($)
--- | ---
Short-term Debt [Line Items] |
2024 | $ 382
2025 | 271
2026 | 241
2027 | 246
2028 | 241
Thereafter | 1,189
Total future amortization | $ 2,570

X
- Definition Future Accretion Of Valuation Discount Year Five + References No definition available. + Details
Name: | fcb_FutureAccretionOfValuationDiscountYearFive
Namespace Prefix: | fcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Future Accretion Of Valuation Discount Year Four + References No definition available. + Details
Name: | fcb_FutureAccretionOfValuationDiscountYearFour
Namespace Prefix: | fcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Future Accretion Of Valuation Discount Year One + References No definition available. + Details
Name: | fcb_FutureAccretionOfValuationDiscountYearOne
Namespace Prefix: | fcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Future Accretion Of Valuation Discount Year Thereafter + References No definition available. + Details
Name: | fcb_FutureAccretionOfValuationDiscountYearThereafter
Namespace Prefix: | fcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Future Accretion Of Valuation Discount Year Three + References No definition available. + Details
Name: | fcb_FutureAccretionOfValuationDiscountYearThree
Namespace Prefix: | fcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Future Accretion Of Valuation Discount Year Two + References No definition available. + Details
Name: | fcb_FutureAccretionOfValuationDiscountYearTwo
Namespace Prefix: | fcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=fcb_SubordinatedDebtRelatedToTrustPreferredSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |