Allowance for Credit Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 121,522	$ 105,680	$ 85,376
Charge-offs	(4,051)	(8,140)	(1,585)
Recoveries	1,413	1,527	1,907
Provision for (Benefit From) Credit Losses	6,482	22,455	17,945
Ending Balance	125,366	121,522	105,680
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning Balance	5,850	4,315	3,790
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for (Benefit From) Credit Losses	150	1,535	525
Ending Balance	6,000	5,850	4,315
Credit Loss [Roll Forward]
Beginning Balance	127,372	109,995	89,166
Charge-offs	(4,051)	(8,140)	(1,585)
Recoveries	1,413	1,527	1,907
Provision for (Benefit From) Credit Losses	6,632	23,990	18,470
Ending Balance	131,366	127,372	109,995
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			2,037
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning Balance			0
Credit Loss [Roll Forward]
Beginning Balance			2,037
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	68,864	61,381	51,140
Charge-offs	0	(3,637)	(294)
Recoveries	189	2	3
Provision for (Benefit From) Credit Losses	3,796	11,118	8,959
Ending Balance	72,849	68,864	61,381
Commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			1,573
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	27,453	24,639	23,474
Charge-offs	(814)	(624)	(594)
Recoveries	612	1,175	743
Provision for (Benefit From) Credit Losses	212	2,263	872
Ending Balance	27,463	27,453	24,639
Consumer \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			144
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	12,750	13,597	3,862
Charge-offs	(1,787)	(3,879)	(697)
Recoveries	547	316	1,157
Provision for (Benefit From) Credit Losses	2,887	2,716	9,194
Ending Balance	14,397	12,750	13,597
Commercial and industrial \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			81
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	8,856	5,142	5,667
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for (Benefit From) Credit Losses	(1,632)	3,714	(726)
Ending Balance	7,224	8,856	5,142
Construction \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			201
Agriculture production
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	3,589	906	1,215
Charge-offs	(1,450)	0	0
Recoveries	65	34	4
Provision for (Benefit From) Credit Losses	1,199	2,649	(351)
Ending Balance	3,403	3,589	906
Agriculture production \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			38
Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	10	15	18
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for (Benefit From) Credit Losses	20	(5)	(3)
Ending Balance	30	10	15
Leases \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			0
CRE non-owner occupied \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	35,077	30,962	25,739
Charge-offs	0	0	0
Recoveries	187	0	1
Provision for (Benefit From) Credit Losses	1,965	4,115	4,476
Ending Balance	37,229	35,077	30,962
CRE non-owner occupied \| Commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			746
CRE owner occupied \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	15,081	14,014	10,691
Charge-offs	0	(3,637)	0
Recoveries	2	2	2
Provision for (Benefit From) Credit Losses	664	4,702	3,258
Ending Balance	15,747	15,081	14,014
CRE owner occupied \| Commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			63
Multifamily \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	14,418	13,132	12,395
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for (Benefit From) Credit Losses	1,495	1,286	737
Ending Balance	15,913	14,418	13,132
Multifamily \| Commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			0
Farmland \| Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	4,288	3,273	2,315
Charge-offs	0	0	(294)
Recoveries	0	0	0
Provision for (Benefit From) Credit Losses	(328)	1,015	488
Ending Balance	3,960	4,288	3,273
Farmland \| Commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			764
SFR 1-4 1st DT liens \| Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	14,009	11,268	10,723
Charge-offs	(27)	0	0
Recoveries	0	262	79
Provision for (Benefit From) Credit Losses	245	2,479	322
Ending Balance	14,227	14,009	11,268
SFR 1-4 1st DT liens \| Consumer \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			144
SFR HELOCs and junior liens \| Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	10,273	11,413	10,510
Charge-offs	(41)	(66)	(22)
Recoveries	395	723	429
Provision for (Benefit From) Credit Losses	(216)	(1,797)	496
Ending Balance	10,411	10,273	11,413
SFR HELOCs and junior liens \| Consumer \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			0
Other \| Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	3,171	1,958	2,241
Charge-offs	(746)	(558)	(572)
Recoveries	217	190	235
Provision for (Benefit From) Credit Losses	183	1,581	54
Ending Balance	$ 2,825	$ 3,171	1,958
Other \| Consumer \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance			$ 0

Credit Loss, Allowance For Credit Loss

No definition available.

Name:	tcbk_CreditLossAllowanceForCreditLoss
Namespace Prefix:	tcbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Credit Loss, Allowance For Credit Loss, Recovery

+ References

No definition available.

+ Details

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

- Definition

Credit Loss, Allowance For Credit Loss, Writeoff

+ References

No definition available.

+ Details

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

- Definition

Credit Loss, Expense (Reversal)

+ References

No definition available.

+ Details

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

- Definition

Credit Loss

+ References

No definition available.

+ Details

Name:	tcbk_CreditLossRollForward
Namespace Prefix:	tcbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Off Balance Sheet, Credit Loss, Recovery

+ References

No definition available.

+ Details

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

- Definition

Off Balance Sheet, Credit Loss, Writeoff

+ References

No definition available.

+ Details

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

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase in allowance for credit loss on financing receivable from recovery.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of writeoff of financing receivable, charged against allowance for credit loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482454/460-10-45-1

+ Details

Name:	us-gaap_OffBalanceSheetCreditLossLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

+ Details

Name:	us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Definition

Amount of credit loss expense (reversal of expense) for financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(11))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

+ Details

Name:	us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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