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: