XML 90 R71.htm IDEA: XBRL DOCUMENT
v3.22.4

Investment Securities - Amortized Cost of Debt Securities Held-to-Maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
AAA/AA/A |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Securities held to maturity | $ 160,983 | $ 199,759
BBB/BB/B |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Securities held to maturity | 0 | 0
Obligations of U.S. government agencies | AAA/AA/A |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Securities held to maturity | 154,830 | 192,068
Obligations of U.S. government agencies | BBB/BB/B |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Securities held to maturity | 0 | 0
Obligations of states and political subdivisions | AAA/AA/A |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Securities held to maturity | 6,153 | 7,691
Obligations of states and political subdivisions | BBB/BB/B |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Securities held to maturity | $ 0 | $ 0

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

X
- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | tcbk_CreditRatingAxis=tcbk_AAAAAAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tcbk_CreditRatingAxis=tcbk_BBBBBBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |