XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.21.1

Loans - Narrative (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 USD ($) loan | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) loan
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 4,966,977 |  | $ 4,763,127
Loan balance, before allowance for credit loss and fee | 5,009,686 |  | 4,805,596
Deferred loan fees | 20,108 |  | 16,984
Loans, including fees | 60,436 | $ 56,258 |
Commercial and industrial |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | 551,077 |  | 526,327
Payment Protection Program (PPP) |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loan balance, before allowance for credit loss and fee | 614,826 |  |
Payment Protection Program (PPP) | Commercial and industrial |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans | $ 370,274 |  | $ 333,982
Number of loans (in loans) | loan | 2,484 |  | 2,300
Number of loans less than $50,000 (in loans) | loan | 1,303 |  |
Allowance for credit loss, balance less than $50,000 | $ 26,895 |  |
Deferred loan fees | 23,585 |  |
Deferred loan costs | 1,163 |  |
Deferred fee accretion | 9,430 | 7,212 |
Loans, including fees | $ 5,232 | $ 0 |

X
- Definition Financing Receivable, Before Allowance For Credit Loss, Balance Less Than $50,000 + References No definition available. + Details
Name: | tcbk_FinancingReceivableBeforeAllowanceForCreditLossBalanceLessThan50000
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Deferred Loan Costs + References No definition available. + Details
Name: | tcbk_FinancingReceivableDeferredLoanCosts
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing Receivable, Number of Loans + References No definition available. + Details
Name: | tcbk_FinancingReceivableNumberOfLoans
Namespace Prefix: | tcbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivable, Number Of Loans, Balance Less Than $50,000 + References No definition available. + Details
Name: | tcbk_FinancingReceivableNumberOfLoansBalanceLessThan50000
Namespace Prefix: | tcbk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivable, Unamortized Loan Fee (Cost) + References No definition available. + Details
Name: | tcbk_FinancingReceivableUnamortizedLoanFeeCost
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before allowance for credit loss and fee, of financing receivable. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_FinancingReceivableBeforeAllowanceForCreditLossAndFee
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of fee received for commitment to originate or purchase financing receivable. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10095-111533 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 + Details
Name: | us-gaap_FinancingReceivableDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
Name: | us-gaap_InterestAndFeeIncomeLoansAndLeases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
Name: | us-gaap_LoansAndLeasesReceivableDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tcbk_PaymentProtectionProgramPPPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |