XML 67 R55.htm IDEA: XBRL DOCUMENT v3.24.2.u1

Allowance for Credit Losses - Amortized Cost Basis of Loans Experiencing Financial difficulty and Modified (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change	$ 0		$ 211
Payment Delay/Term Extension	$ 461	$ 177	$ 1,018	$ 177
Total % of Loans Outstanding (Percentage)	0.01%	0.03%	0.02%	0.03%
SFR HELOCs and junior liens
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change			$ 0
Payment Delay/Term Extension			$ 41	$ 0
Total % of Loans Outstanding (Percentage)			0.01%	0.00%
Commercial real estate | CRE non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change			$ 211
Payment Delay/Term Extension			$ 0	$ 0
Total % of Loans Outstanding (Percentage)			0.01%	0.00%
Commercial real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change	$ 0		$ 0
Payment Delay/Term Extension	$ 295	$ 0	$ 295	$ 0
Total % of Loans Outstanding (Percentage)	0.03%	0.00%	0.029%	0.00%
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Combination - Term Extension/Rate Change	$ 0		$ 0
Payment Delay/Term Extension	$ 166	$ 177	$ 682	$ 177
Total % of Loans Outstanding (Percentage)	0.03%	0.03%	0.12%	0.03%

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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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=srt_MultifamilyMember
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: