XML 64 R48.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Cash Value of Life Insurance (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Cash Value of Life Insurance [Abstract] |
Summary of Activity in Balance of Cash Value of Life Insurance | A summary of the activity in the balance of cash value of life insurance follows:
| Year ended December 31,
(in thousands) | 2024 |  | 2023
Beginning balance | $ | 136,892 |  |  | $ | 133,742 |
Increase in cash value of life insurance | 3,257 |  |  | 3,150 |
Ending balance | $ | 140,149 |  |  | $ | 136,892 |
End of period death benefit | $ | 224,723 |  |  | $ | 224,021 |
Number of policies owned | 216 |  |  | 216 |
Insurance companies used | 14 |  |  | 14 |
Current and former employees and directors covered | 79 |  |  | 79 |

X
- Definition Cash Value of Life Insurance + References No definition available. + Details
Name: | tcbk_CashValueOfLifeInsuranceAbstract
Namespace Prefix: | tcbk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary of the activity in the balance of cash value of life insurance. + References No definition available. + Details
Name: | tcbk_SummaryOfActivityInBalanceOfCashValueOfLifeInsuranceTableTextBlock
Namespace Prefix: | tcbk_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration