XML 42 R23.htm IDEA: XBRL DOCUMENT
v3.22.4

Other Borrowings | 12 Months Ended
--- | ---
Dec. 31, 2022
Debt Disclosure [Abstract] |
Other Borrowings | Other Borrowings A summary of the balances of other borrowings follows:
| December 31,
| 2022 |  | 2021
(in thousands) |
Overnight borrowing at FHLB, fixed rate, as of December 31, 2022 of 4.65%, payable on January 3, 2023 | $ | 216,700 |  |  | $ | — |
Other collateralized borrowings, fixed rate, as of December 31, 2022 and 2020 of 0.05%, payable on January 3, 2023 and January 3, 2022, respectively | 47,905 |  |  | 50,087 |
Total other borrowings | $ | 264,605 |  |  | $ | 50,087 |
Other collateralized borrowings are generally overnight maturity borrowings from non-financial institutions that are collateralized by securities owned by the Company. As of December 31, 2022, the Company has pledged as collateral and sold under agreements to repurchase investment securities with fair value of $47,905,000 under these other collateralized borrowings. The Company maintains a collateralized line of credit with the FHLB. Based on the FHLB stock requirements at December 31, 2022, this line provided for maximum borrowings of $2,485,905,000 of which $216,700,000 was outstanding. As of December 31, 2022, the Company had designated investment securities with a fair value of $80,187,000 and loans with unpaid principal balances totaling $4,389,161,000 as potential collateral under this collateralized line of credit with the FHLB. The Company maintains a collateralized line of credit with the Federal Reserve Bank of San Francisco (“FRB”). As of December 31, 2022, this line provided for maximum borrowings of $299,689,000 of which none was outstanding. As of December 31, 2022, the Company has designated investment securities with fair value of $5,000 and loans with unpaid principal balances totaling $424,946,000 as potential collateral under this collateralized line of credit with the FRB. The Company has available unused correspondent banking lines of credit from commercial banks totaling $30,000,000 for federal funds transactions at December 31, 2022.

X
- Definition Other borrowings. + References No definition available. + Details
Name: | tcbk_OtherBorrowingsTextBlock
Namespace Prefix: | tcbk_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration