XML 63 R51.htm IDEA: XBRL DOCUMENT
v3.25.1

Allowance for Credit Losses - Summary of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | $ 125,366 | $ 121,522 | $ 121,522
Charge-offs | (374) | (1,275) | (4,051)
Recoveries | 768 | 132 | 1,413
Provision (benefit) | 2,663 | 4,015 | 6,482
Ending balance | 128,423 | 124,394 | 125,366
Off-Balance Sheet, Credit Loss, Liability [Roll Forward] |  |  |
Beginning balance | 6,000 | 5,850 | 5,850
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision for (benefit from) credit losses | 1,065 | 290 | 150
Ending balance | 7,065 | 6,140 | 6,000
Credit Loss [Roll Forward] |  |  |
Beginning balance | 131,366 | 127,372 | 127,372
Charge-offs | (374) | (1,275) | (4,051)
Recoveries | 768 | 132 | 1,413
Provision for (benefit from) credit losses | 3,728 | 4,305 | 6,632
Ending balance | 135,488 | 130,534 | 131,366
Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 72,849 | 68,864 | 68,864
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 189
Provision (benefit) | (669) | 3,311 | 3,796
Ending balance | 72,180 | 72,175 | 72,849
Consumer |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 27,463 | 27,453 | 27,453
Charge-offs | (117) | (308) | (814)
Recoveries | 49 | 89 | 612
Provision (benefit) | (1,855) | 207 | 212
Ending balance | 25,540 | 27,441 | 27,463
Commercial and industrial |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 14,397 | 12,750 | 12,750
Charge-offs | (257) | (130) | (1,787)
Recoveries | 106 | 22 | 547
Provision (benefit) | 3,315 | (775) | 2,887
Ending balance | 17,561 | 11,867 | 14,397
Construction |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 7,224 | 8,856 | 8,856
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision (benefit) | 3,122 | 306 | (1,632)
Ending balance | 10,346 | 9,162 | 7,224
Agriculture production |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 3,403 | 3,589 | 3,589
Charge-offs | 0 | (837) | (1,450)
Recoveries | 613 | 21 | 65
Provision (benefit) | (1,248) | 935 | 1,199
Ending balance | 2,768 | 3,708 | 3,403
Leases |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 30 | 10 | 10
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision (benefit) | (2) | 31 | 20
Ending balance | 28 | 41 | 30
CRE non-owner occupied | Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 37,229 | 35,077 | 35,077
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 187
Provision (benefit) | 2,441 | 1,610 | 1,965
Ending balance | 39,670 | 36,687 | 37,229
CRE owner occupied | Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 15,747 | 15,081 | 15,081
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 2
Provision (benefit) | (3,578) | 1,030 | 664
Ending balance | 12,169 | 16,111 | 15,747
Multifamily | Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 15,913 | 14,418 | 14,418
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision (benefit) | (309) | 1,264 | 1,495
Ending balance | 15,604 | 15,682 | 15,913
Farmland | Commercial real estate |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 3,960 | 4,288 | 4,288
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision (benefit) | 777 | (593) | (328)
Ending balance | 4,737 | 3,695 | 3,960
SFR 1-4 1st DT liens | Consumer |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 14,227 | 14,009 | 14,009
Charge-offs | 0 | (26) | (27)
Recoveries | 0 | 0 | 0
Provision (benefit) | (3,232) | 157 | 245
Ending balance | 10,995 | 14,140 | 14,227
SFR HELOCs and junior liens | Consumer |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 10,411 | 10,273 | 10,273
Charge-offs | 0 | (32) | (41)
Recoveries | 12 | 49 | 395
Provision (benefit) | 1,227 | (348) | (216)
Ending balance | 11,650 | 9,942 | 10,411
Other | Consumer |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 2,825 | 3,171 | 3,171
Charge-offs | (117) | (250) | (746)
Recoveries | 37 | 40 | 217
Provision (benefit) | 150 | 398 | 183
Ending balance | $ 2,895 | $ 3,359 | $ 2,825

X
- Definition Credit Loss, Allowance For Credit Loss + References No definition available. + Details
Name: | tcbk_CreditLossAllowanceForCreditLoss
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Credit Loss, Allowance For Credit Loss, Recovery + References No definition available. + Details
Name: | tcbk_CreditLossAllowanceForCreditLossRecovery
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Credit Loss, Allowance For Credit Loss, Writeoff + References No definition available. + Details
Name: | tcbk_CreditLossAllowanceForCreditLossWriteoff
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Credit Loss, Expense (Reversal) + References No definition available. + Details
Name: | tcbk_CreditLossExpenseReversal
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Credit Loss + References No definition available. + Details
Name: | tcbk_CreditLossRollForward
Namespace Prefix: | tcbk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Off Balance Sheet, Credit Loss, Recovery + References No definition available. + Details
Name: | tcbk_OffBalanceSheetCreditLossRecovery
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Off Balance Sheet, Credit Loss, Writeoff + References No definition available. + Details
Name: | tcbk_OffBalanceSheetCreditLossWriteoff
Namespace Prefix: | tcbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-6 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482454/460-10-45-1 + Details
Name: | us-gaap_OffBalanceSheetCreditLossLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
Name: | us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_OffBalanceSheetCreditLossLiabilityRollforward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
Name: | us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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

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

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

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

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

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

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tcbk_SFR141stDTLiensMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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