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Allowance for Credit Losses - Amortized Cost Basis of Loans Experiencing Financial Difficulty and Modified (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Forgiveness	$ 0
Payment Delay/Term Extension	152
Combination - Term Change / Available Credit Reduction	60
Combination - Payment Delay/Term Reduction	$ 1,430
Total % of Loans Outstanding (Percentage)	0.61%
Reduction of available credit	$ 11
Commercial real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Forgiveness	0
Payment Delay/Term Extension	0
Combination - Term Change / Available Credit Reduction	0
Combination - Payment Delay/Term Reduction	$ 1,430
Total % of Loans Outstanding (Percentage)	0.53%
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Forgiveness	$ 0
Payment Delay/Term Extension	152
Combination - Term Change / Available Credit Reduction	60
Combination - Payment Delay/Term Reduction	$ 0
Total % of Loans Outstanding (Percentage)	0.08%

X

- Definition

Allowance for Credit Loss, Term Change, Available Credit Reduction

+ References

No definition available.

+ Details

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

X

- Definition

Combination Payment Delay Or Term Reduction

+ References

No definition available.

+ Details

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

X

- Definition

Financing Receivable, Amortized Costs Basis, Percentage Outstanding

+ References

No definition available.

+ Details

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Namespace Prefix:	tcbk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Financing Receivable, Modification, Reduction Of Available Credit, Amount

+ References

No definition available.

+ Details

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

X

- Definition

Payment Delay/Extension, Amount

+ References

No definition available.

+ Details

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

X

- Definition

Principal Forgiveness

+ References

No definition available.

+ Details

Name:	tcbk_PrincipalForgiveness
Namespace Prefix:	tcbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: