XML 70 R59.htm IDEA: XBRL DOCUMENT
v3.23.2

Allowance for Credit Losses - Amortized Cost Basis of Loans Experiencing Financial difficulty and Modified (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) | Jun. 30, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 177 | $ 177
Total % of Loans Outstanding (Percentage) | 0.03% | 0.03%
Commercial Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Commercial Real Estate | CRE non-owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Commercial Real Estate | CRE owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Commercial Real Estate | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Commercial Real Estate | Farmland |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Consumer | SFR 1-4 1st DT liens |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Consumer | SFR HELOCs and junior liens |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Consumer | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 177 | $ 177
Total % of Loans Outstanding (Percentage) | 0.03% | 0.03%
Weighted average term extension | 12 months | 12 months
Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Agriculture production |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%
Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment Delay/Term Extension | $ 0 | $ 0
Total % of Loans Outstanding (Percentage) | 0.00% | 0.00%

X
- Definition Percentage of nonaccrual to total financing receivable outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SEC + Details
Name: | srt_FinancingReceivableNonaccrualToOutstandingPercent
Namespace Prefix: | srt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivable, Weighted Average Term Extension + References No definition available. + Details
Name: | tcbk_FinancingReceivableWeightedAverageTermExtension
Namespace Prefix: | tcbk_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payment Delay/Extension, Amount + References No definition available. + Details
Name: | tcbk_PaymentDelayExtensionAmount
Namespace Prefix: | tcbk_
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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tcbk_SFR141stDTLiensMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=tcbk_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=tcbk_ConstructionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=tcbk_AgricultureProductionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |