XML 69 R57.htm IDEA: XBRL DOCUMENT v3.25.1

Allowance for Credit Losses - Amortized Cost Basis of Loans Experiencing Financial difficulty and Modified (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change	$ 0
Payment Delay/Term Extension	$ 0	$ 211
Payment Delay/Term Reduction		$ 557
Total % of loans outstanding (percentage)	0.00%	0.11%
Commercial real estate | CRE non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change	$ 0
Payment Delay/Term Extension	$ 0	$ 211
Payment Delay/Term Reduction		$ 0
Total % of loans outstanding (percentage)	0.00%	0.03%
Consumer | SFR HELOCs and junior liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change	$ 0
Payment Delay/Term Extension	$ 0	$ 0
Payment Delay/Term Reduction		$ 41
Total % of loans outstanding (percentage)	0.00%	0.01%
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change	$ 0
Payment Delay/Term Extension	$ 0	$ 0
Payment Delay/Term Reduction		$ 516
Total % of loans outstanding (percentage)	0.00%	0.07%

X

- Definition

Combination Payment Delay Or Term Reduction

+ References

No definition available.

+ Details

Name:	tcbk_CombinationPaymentDelayOrTermReduction
Namespace Prefix:	tcbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Payment Combination/Extension, Amount

+ References

No definition available.

+ Details

Name:	tcbk_PaymentCombinationExtensionAmount
Namespace Prefix:	tcbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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:	duration

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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

+ Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
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_FinancingReceivablePortfolioSegmentAxis=tcbk_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: