$TCBK
TRICO BANCSHARES / Stock $tcbk

$tcbk Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000035617120000021 Filed on March 02, 2020

Income Statement

Concept	2018 Q4	2018 Q3	2018 Q2
Revenue	$68.07M	$64.55M	$48.48M
YoY Change	44.94%	40.6%	7.62%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.500M	$3.100M	$2.000M
YoY Change	75.0%	40.91%	0.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$4.063M	$4.065M	$2.609M
YoY Change	117.51%	122.25%	62.05%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$30.55M	$22.65M	$20.81M
YoY Change	71.43%	19.02%	-2.0%
Income Tax	$7.334M	$6.476M	$5.782M
% Of Pretax Income	24.01%	28.6%	27.78%
Net Earnings	$23.21M	$16.17M	$15.03M
YoY Change	676.55%	35.92%	10.6%
Net Earnings / Revenue	34.1%	25.05%	31.0%
Basic Earnings Per Share		$0.54	$0.65
Diluted Earnings Per Share	$0.76	$0.53	$0.65
COMMON SHARES
Basic Shares Outstanding	30.42M shares	30.01M shares	22.98M shares
Diluted Shares Outstanding		30.29M shares	23.28M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$227.5M	$226.5M	$184.1M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$89.35M	$89.29M	$59.01M
YoY Change	54.73%	62.36%	14.46%
Goodwill	$221.0M	$221.0M	$64.31M
YoY Change	243.6%	243.6%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$26.10M	$32.00M	$27.70M
YoY Change	20.28%	-3.32%	-16.31%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$6.352B	$6.319B	$4.863B
YoY Change	33.42%	35.7%	7.59%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.000M	$1.700M	$1.200M
YoY Change	122.22%	88.89%	50.0%
Accrued Expenses		$18.40M	$11.90M
YoY Change		46.03%	9.17%
Deferred Revenue
YoY Change
Short-Term Debt	$15.80M	$282.8M	$16.80M
YoY Change	-9.2%	2075.38%	2.44%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$2.000M	$20.10M	$13.10M
YoY Change	-85.82%	48.89%	11.97%
LONG-TERM LIABILITIES
Long-Term Debt	$57.00M	$57.00M	$57.00M
YoY Change	0.18%	0.35%	0.35%
Other Long-Term Liabilities	$83.70M	$8.345M	$3.596M
YoY Change	924.35%	187.66%	225.43%
Total Long-Term Liabilities	$140.7M	$8.345M	$3.596M
YoY Change	1621.94%	187.66%	225.43%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.000M	$20.10M	$13.10M
Total Long-Term Liabilities	$140.7M	$8.345M	$3.596M
Total Liabilities	$5.525B	$5.517B	$4.351B
YoY Change	29.83%	32.94%	8.2%
SHAREHOLDERS EQUITY
Retained Earnings	$303.5M	$287.6M	$276.9M
YoY Change	18.92%	12.28%	11.36%
Common Stock	$541.8M	$541.5M	$256.6M
YoY Change	111.76%	112.17%	0.7%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$827.4M	$802.1M	$512.3M
YoY Change
Total Liabilities & Shareholders Equity	$6.352B	$6.319B	$4.863B
YoY Change	33.42%	35.7%	7.59%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2018 Q2
OPERATING ACTIVITIES
Net Income	$23.21M	$16.17M	$15.03M
YoY Change	676.55%	35.92%	10.6%
Depreciation, Depletion And Amortization	$3.500M	$3.100M	$2.000M
YoY Change	75.0%	40.91%	0.0%
Cash From Operating Activities	$31.20M	$27.00M	$9.200M
YoY Change	225.0%	48.35%	12.2%
INVESTING ACTIVITIES
Capital Expenditures	-$1.700M	-$1.600M	-$1.900M
YoY Change	-60.47%	-68.0%	-45.71%
Acquisitions
YoY Change
Other Investing Activities	-$27.50M	$33.60M	-$82.50M
YoY Change	-69.2%	-129.55%	-42.27%
Cash From Investing Activities	-$29.10M	$31.90M	-$84.40M
YoY Change	-68.88%	-126.87%	-42.35%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.100M	-16.40M	76.30M
YoY Change	-101.08%	-113.58%	-531.07%
NET CHANGE
Cash From Operating Activities	31.20M	27.00M	9.200M
Cash From Investing Activities	-29.10M	31.90M	-84.40M
Cash From Financing Activities	-1.100M	-16.40M	76.30M
Net Change In Cash	1.000M	42.50M	1.100M
YoY Change	-94.29%	109.36%	-100.71%
FREE CASH FLOW
Cash From Operating Activities	$31.20M	$27.00M	$9.200M
Capital Expenditures	-$1.700M	-$1.600M	-$1.900M
Free Cash Flow	$32.90M	$28.60M	$11.10M
YoY Change	136.69%	23.28%	-5.13%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000356171
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	tcbk	Tdr Loans Payment Period In Non Accrual Status TdrLoansPaymentPeriodInNonAccrualStatus	P6M
CY2019	tcbk	Employee Service Period Under Esop EmployeeServicePeriodUnderEsop	P1Y
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Entity File Number EntityFileNumber	0-10661
CY2019	dei	Entity Registrant Name EntityRegistrantName	TriCo Bancshares
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	CA
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	94-2792841
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	94-2792841
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	63 Constitution Drive
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Chico
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95973
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95973
CY2019	dei	City Area Code CityAreaCode	530
CY2019	dei	Local Phone Number LocalPhoneNumber	898-0300
CY2019	dei	Security12b Title Security12bTitle	Common Stock
CY2019	dei	Trading Symbol TradingSymbol	TCBK
CY2019	dei	Trading Symbol TradingSymbol	TCBK
CY2019	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	1003743000	USD
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CY2019Q4	tcbk	Mortgage Servicing Rights Amount MortgageServicingRightsAmount	27879000	USD
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CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	77512000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	34750000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25032000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36958000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	92072000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	68320000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	40554000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	370000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.57
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.77
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.00
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.54
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.74
CY2019	us-gaap	Net Income Loss NetIncomeLoss	92072000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	68320000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	40554000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	17159000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-12434000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	3165000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4502000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-388000	USD
CY2019	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Net Of Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsNetOfTax	0	USD
CY2018	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Net Of Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsNetOfTax	426000	USD
CY2017	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Net Of Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsNetOfTax	-110000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-11620000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	12657000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2685000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	104729000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	56700000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	43239000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	477347000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	40554000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2685000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	259000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	895000	USD
CY2017	tcbk	Adjustments To Additional Paid In Capital Share Based Compensation Market Plus Service Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationMarketPlusServiceRestrictedStockUnitsRequisiteServicePeriodRecognition	432000	USD
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2621000	USD
CY2017	tcbk	Restricted Stock Units Released RestrictedStockUnitsReleased	0	USD
CY2017	tcbk	Tax Benefit From Release Of Restricted Stock Units TaxBenefitFromReleaseOfRestrictedStockUnits	0	USD
CY2017	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3854000	USD
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.66
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	15131000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	505808000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	68320000	USD
CY2019	tcbk	Restricted Stock Units Released RestrictedStockUnitsReleased	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-11620000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	75000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	1017000	USD
CY2018	tcbk	Adjustments To Additional Paid In Capital Share Based Compensation Market Plus Service Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationMarketPlusServiceRestrictedStockUnitsRequisiteServicePeriodRecognition	370000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1704000	USD
CY2018	tcbk	Restricted Stock Units Released RestrictedStockUnitsReleased	0	USD
CY2018	tcbk	Market Plus Service Restricted Stock Units Released MarketPlusServiceRestrictedStockUnitsReleased	0	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	284437000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3969000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.70
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18769000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	827373000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	92072000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	12657000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	1161000	USD
CY2019	tcbk	Adjustments To Additional Paid In Capital Share Based Compensation Market Plus Service Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationMarketPlusServiceRestrictedStockUnitsRequisiteServicePeriodRecognition	493000	USD
CY2019	tcbk	Market Plus Service Restricted Stock Units Released MarketPlusServiceRestrictedStockUnitsReleased	0	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2921000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	5108000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.82
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	24999000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	906570000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	92072000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	68320000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	40554000	USD
CY2019	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	6915000	USD
CY2018	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	7014000	USD
CY2017	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	6787000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5723000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3499000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1389000	USD
CY2019	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	-1690000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3282000	USD
CY2018	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	2583000	USD
CY2017	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	89000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2547000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2512000	USD
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3200000	USD
CY2019	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	110000	USD
CY2018	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	207000	USD
CY2017	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	961000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	131074000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	84245000	USD
CY2017	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	114107000	USD
CY2019	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	131689000	USD
CY2018	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	86988000	USD
CY2017	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	114788000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	2371000	USD
CY2018	tcbk	Change In Market Value Of Mortgage Servicing Rights ChangeInMarketValueOfMortgageServicingRights	146000	USD
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3109000	USD
CY2019	tcbk	Change In Market Value Of Mortgage Servicing Rights ChangeInMarketValueOfMortgageServicingRights	1811000	USD
CY2017	tcbk	Change In Market Value Of Mortgage Servicing Rights ChangeInMarketValueOfMortgageServicingRights	718000	USD
CY2019	tcbk	Provision For Benefit From Losses On Foreclosed Assets ProvisionForBenefitFromLossesOnForeclosedAssets	-102000	USD
CY2018	tcbk	Provision For Benefit From Losses On Foreclosed Assets ProvisionForBenefitFromLossesOnForeclosedAssets	89000	USD
CY2017	tcbk	Provision For Benefit From Losses On Foreclosed Assets ProvisionForBenefitFromLossesOnForeclosedAssets	162000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1692000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2600000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12473000	USD
CY2019	tcbk	Loss Gain On Sale Of Foreclosed Assets LossGainOnSaleOfForeclosedAssets	608000	USD
CY2018	tcbk	Loss Gain On Sale Of Foreclosed Assets LossGainOnSaleOfForeclosedAssets	408000	USD
CY2017	tcbk	Loss Gain On Sale Of Foreclosed Assets LossGainOnSaleOfForeclosedAssets	711000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	4931000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-82000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-185000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-142000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-3193000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	68346000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	68937000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1153000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	10129000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	102806000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	91069000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	86371000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	127066000	USD
CY2018	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	30613000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	97993000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	73014000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	55381000	USD
CY2019	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	63942000	USD
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3029000	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2718000	USD
CY2017	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2685000	USD
CY2019	tcbk	Life Insurance Benefit In Excess Of Cash Value LifeInsuranceBenefitInExcessOfCashValue	831000	USD
CY2017	tcbk	Life Insurance Benefit In Excess Of Cash Value LifeInsuranceBenefitInExcessOfCashValue	108000	USD
CY2019	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	86000	USD
CY2018	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	-64000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	1654000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	1462000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	1586000	USD
CY2019	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-515000	USD
CY2018	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	5640000	USD
CY2017	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1745000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	410000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	1067000	USD
CY2017	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	112000	USD
CY2019	tcbk	Lessee Operating Lease Right Of Use Asset Amortization LesseeOperatingLeaseRightOfUseAssetAmortization	4592000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	293279000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	25757000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	37253000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	436678000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	265806000	USD
CY2019	tcbk	Redemption Purchase Of Restricted Equity Securities Net RedemptionPurchaseOfRestrictedEquitySecuritiesNet	0	USD
CY2018	tcbk	Redemption Purchase Of Restricted Equity Securities Net RedemptionPurchaseOfRestrictedEquitySecuritiesNet	7429000	USD
CY2019	tcbk	Payment For Loan And Lease Originations And Principal Collections PaymentForLoanAndLeaseOriginationsAndPrincipalCollections	286339000	USD
CY2018	tcbk	Payment For Loan And Lease Originations And Principal Collections PaymentForLoanAndLeaseOriginationsAndPrincipalCollections	173752000	USD
CY2017	tcbk	Payment For Loan And Lease Originations And Principal Collections PaymentForLoanAndLeaseOriginationsAndPrincipalCollections	259404000	USD
CY2019	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	1336000	USD
CY2018	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	2527000	USD
CY2017	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	2872000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	63000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3338000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4293000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7435000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-271327000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	104673000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	15164000	USD
CY2019	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	3355000	USD
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	649000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-29789000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-142003000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-357445000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	528000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	365400000	USD
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	113571000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	2615000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2196000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2483000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1629000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	24999000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	18769000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	15131000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	9000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	218000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	396000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-24043000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	73039000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	201880000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	48974000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	22105000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-100184000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	227533000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	205428000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	305612000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	276507000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	227533000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	205428000	USD
CY2019	tcbk	Unrealized Gain Loss On Securities Available For Sale UnrealizedGainLossOnSecuritiesAvailableForSale	24361000	USD
CY2018	tcbk	Unrealized Gain Loss On Securities Available For Sale UnrealizedGainLossOnSecuritiesAvailableForSale	-17627000	USD
CY2017	tcbk	Unrealized Gain Loss On Securities Available For Sale UnrealizedGainLossOnSecuritiesAvailableForSale	5461000	USD
CY2019	tcbk	Loans Transferred To Foreclosed Assets LoansTransferredToForeclosedAssets	1249000	USD
CY2018	tcbk	Loans Transferred To Foreclosed Assets LoansTransferredToForeclosedAssets	1262000	USD
CY2017	tcbk	Loans Transferred To Foreclosed Assets LoansTransferredToForeclosedAssets	1563000	USD
CY2019	tcbk	Market Value Of Shares Tendered By Employees In Lieu Of Cash To Pay For Exercise Of Options And Or Related Taxes MarketValueOfSharesTenderedByEmployeesInLieuOfCashToPayForExerciseOfOptionsAndOrRelatedTaxes	5108000	USD
CY2018	tcbk	Market Value Of Shares Tendered By Employees In Lieu Of Cash To Pay For Exercise Of Options And Or Related Taxes MarketValueOfSharesTenderedByEmployeesInLieuOfCashToPayForExerciseOfOptionsAndOrRelatedTaxes	1486000	USD
CY2017	tcbk	Market Value Of Shares Tendered By Employees In Lieu Of Cash To Pay For Exercise Of Options And Or Related Taxes MarketValueOfSharesTenderedByEmployeesInLieuOfCashToPayForExerciseOfOptionsAndOrRelatedTaxes	2225000	USD
CY2019	tcbk	Obligations Incurred Leased Assets ObligationsIncurredLeasedAssets	156000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	14965000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	11805000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	5609000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	35050000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	14525000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21170000	USD
CY2019	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
CY2018	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	1463100000	USD
CY2017	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
CY2019	tcbk	Liabilities Assumed In Acquisition LiabilitiesAssumedInAcquisition	0	USD
CY2018	tcbk	Liabilities Assumed In Acquisition LiabilitiesAssumedInAcquisition	1171968000	USD
CY2017	tcbk	Liabilities Assumed In Acquisition LiabilitiesAssumedInAcquisition	0	USD
CY2019	tcbk	Number Of Subsidiary Business Trust NumberOfSubsidiaryBusinessTrust	5	Trust
CY2019Q4	tcbk	Number Of Loan Production Offices NumberOfLoanProductionOffices	2	Office
CY2019Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	1719000	USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:15pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:120%;">Use of Estimates in the Preparation of Financial Statements</span></div><div style="margin-top:6pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.</span></div>
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-top:15pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:120%;">Segment and Significant Group Concentration of Credit Risk</span></div><div style="margin-top:6pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%;">The Company grants agribusiness, commercial, consumer, and residential loans to customers located throughout Northern and Central California. The Company has a diversified loan portfolio within the business segments located in this geographical area. The Company currently classifies all its operation into one business segment that it denotes as community banking.</span></div>
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	Segment
CY2017Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2874000	USD
CY2019	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	86000	USD
CY2018	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	-64000	USD
CY2017	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2019	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2018	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-top:18pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:120%;">Reclassifications</span></div><div style="margin-top:6pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:120%;">Certain amounts reported in previous consolidated financial statements have been reclassified and recalculated to conform to the presentation in this report. These reclassifications did not affect previously reported amounts of net income, total assets or total shareholders’ equity.</span></div>
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30616000	USD
CY2019	tcbk	Business Acquisitions Pro Forma Net Interest Income BusinessAcquisitionsProFormaNetInterestIncome	242793000	USD
CY2018	tcbk	Business Acquisitions Pro Forma Net Interest Income BusinessAcquisitionsProFormaNetInterestIncome	227795000	USD
CY2019	tcbk	Business Acquisitions Pro Forma Provision For Benefit From Loan Losses BusinessAcquisitionsProFormaProvisionForBenefitFromLoanLosses	2180000	USD
CY2018	tcbk	Business Acquisitions Pro Forma Provision For Benefit From Loan Losses BusinessAcquisitionsProFormaProvisionForBenefitFromLoanLosses	-271000	USD
CY2019	tcbk	Business Acquisitions Pro Forma Noninterest Income BusinessAcquisitionsProFormaNoninterestIncome	51152000	USD
CY2018	tcbk	Business Acquisitions Pro Forma Noninterest Income BusinessAcquisitionsProFormaNoninterestIncome	53881000	USD
CY2019	tcbk	Business Acquisitions Pro Forma Noninterest Expense BusinessAcquisitionsProFormaNoninterestExpense	180884000	USD
CY2018	tcbk	Business Acquisitions Pro Forma Noninterest Expense BusinessAcquisitionsProFormaNoninterestExpense	181833000	USD
CY2019	tcbk	Business Acquisitions Pro Forma Income Before Taxes BusinessAcquisitionsProFormaIncomeBeforeTaxes	110881000	USD
CY2018	tcbk	Business Acquisitions Pro Forma Income Before Taxes BusinessAcquisitionsProFormaIncomeBeforeTaxes	100114000	USD
CY2019	tcbk	Business Acquisitions Pro Forma Income Tax Expense Benefit BusinessAcquisitionsProFormaIncomeTaxExpenseBenefit	-30337000	USD
CY2018	tcbk	Business Acquisitions Pro Forma Income Tax Expense Benefit BusinessAcquisitionsProFormaIncomeTaxExpenseBenefit	-47352000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	80544000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	52762000	USD
CY2019	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.65
CY2018	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.74
CY2019	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.63
CY2018	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.72
CY2019Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	946751000	USD
CY2019Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	10721000	USD
CY2019Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	7334000	USD
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	950138000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	375606000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	6399000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	480000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	381525000	USD
CY2018Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1136010000	USD
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1235000	USD
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	22209000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1115036000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	444936000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	409000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	7975000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	437370000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	127066000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	338000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	-228000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	293279000	USD
CY2018	tcbk	Gross Realized Investment Gains GrossRealizedInvestmentGains	207000	USD
CY2017	tcbk	Available For Sale Securities Sold At Carrying Value AvailableForSaleSecuritiesSoldAtCarryingValue	24796000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	25757000	USD
CY2017	us-gaap	Debt Securities Available For Sale Gain Loss DebtSecuritiesAvailableForSaleGainLoss	961000	USD
CY2019Q4	tcbk	Securities Pledged As Collateral SecuritiesPledgedAsCollateral	466321000	USD
CY2018Q4	tcbk	Securities Pledged As Collateral SecuritiesPledgedAsCollateral	597591000	USD
CY2019Q4	us-gaap	Us Government Agencies Securities At Carrying Value USGovernmentAgenciesSecuritiesAtCarryingValue	827924000	USD
CY2019	tcbk	Life Of Mortgage Backed Securities LifeOfMortgageBackedSecurities	P4Y10M24D
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	607000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	611000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	1271000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	1280000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	14853000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	15204000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	0	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	0	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	91635000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	21639000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	839656000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	946751000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	91739000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	21366000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	842584000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	352969000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	358606000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	950138000	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	375606000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	381525000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	274950000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4845000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	123833000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2489000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	398783000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	7334000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	18813000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	142000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	62952000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	338000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	81765000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	480000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	336433000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	6148000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	415349000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	16061000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	751782000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	22209000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	229596000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2733000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	162690000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	5242000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	392286000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	7975000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4307366000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	4351725000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	8927000	USD
CY2019Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-35432000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4307366000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30616000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4022014000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	4075244000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	9868000	USD
CY2018Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-43362000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4022014000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	32582000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	6059000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	6137000	USD
CY2016Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	7670000	USD
CY2019	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	852000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	787000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	2809000	USD
CY2019	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	1012000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	709000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications To From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference	1276000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	6219000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	6059000	USD
CY2019	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	-1690000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	6137000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30616000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	32582000	USD
CY2019	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3639000	USD
CY2019	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	3363000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	29675000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	935000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30616000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4277033000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	19917000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4307366000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30323000	USD
CY2018	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	2364000	USD
CY2018	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	2040000	USD
CY2019Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	29453000	USD
CY2018Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	29065000	USD
CY2018	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	2583000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	32582000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	30266000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	2194000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	32582000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3979744000	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	28047000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4022014000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	32503000	USD
CY2017	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	4410000	USD
CY2017	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	2141000	USD
CY2017	us-gaap	Allowance For Loan And Lease Losses Adjustments Net AllowanceForLoanAndLeaseLossesAdjustmentsNet	89000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30323000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	27352000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	2699000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30323000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	120000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	113000	USD
CY2017Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2971371000	USD
CY2017Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	28234000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	3015165000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	14662000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	22274000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	7000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	120000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	7000	USD
CY2018	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	60000	USD
CY2018	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	1000	USD
CY2019	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	18	SecurityLoan
CY2019	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	2851000	USD
CY2019	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	2829000	USD
CY2019	tcbk	Financial Impact Due To Troubled Debt Restructure Additional Provision FinancialImpactDueToTroubledDebtRestructureAdditionalProvision	59000	USD
CY2019	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	SecurityLoan
CY2019	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	7000	USD
CY2019	tcbk	Financial Impact Due To Troubled Debt Restructure Charge Provision FinancialImpactDueToTroubledDebtRestructureChargeProvision	0	USD
CY2018	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	17	SecurityLoan
CY2018	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3768000	USD
CY2018	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3755000	USD
CY2018	tcbk	Financial Impact Due To Troubled Debt Restructure Additional Provision FinancialImpactDueToTroubledDebtRestructureAdditionalProvision	781000	USD
CY2018	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	6	SecurityLoan
CY2018	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	565000	USD
CY2017	tcbk	Financial Impact Due To Troubled Debt Restructure Charge Provision FinancialImpactDueToTroubledDebtRestructureChargeProvision	-5000	USD
CY2017	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	26	SecurityLoan
CY2017	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	7111000	USD
CY2017	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	6978000	USD
CY2017	tcbk	Financial Impact Due To Troubled Debt Restructure Additional Provision FinancialImpactDueToTroubledDebtRestructureAdditionalProvision	133000	USD
CY2018Q4	tcbk	Furniture And Equipment FurnitureAndEquipment	45228000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	140417000	USD
CY2019Q4	tcbk	Premises Premises	65241000	USD
CY2018Q4	tcbk	Premises Premises	64478000	USD
CY2019Q4	tcbk	Furniture And Equipment FurnitureAndEquipment	45723000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	138771000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	53704000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	50125000	USD
CY2019Q4	tcbk	Property Plant And Equipment Less Depreciation Gross PropertyPlantAndEquipmentLessDepreciationGross	86713000	USD
CY2017	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	5	SecurityLoan
CY2017	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	624000	USD
CY2017	tcbk	Financial Impact Due To Troubled Debt Restructure Charge Provision FinancialImpactDueToTroubledDebtRestructureChargeProvision	-5000	USD
CY2018Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2280000	USD
CY2017Q4	us-gaap	Foreclosed Assets ForeclosedAssets	3226000	USD
CY2019	tcbk	Additions Reductions Transfers From Loans Related To Foreclosed Assets AdditionsReductionsTransfersFromLoansRelatedToForeclosedAssets	1249000	USD
CY2018	tcbk	Additions Reductions Transfers From Loans Related To Foreclosed Assets AdditionsReductionsTransfersFromLoansRelatedToForeclosedAssets	1262000	USD
CY2019	us-gaap	Other Real Estate Disposals OtherRealEstateDisposals	1090000	USD
CY2018	us-gaap	Other Real Estate Disposals OtherRealEstateDisposals	2119000	USD
CY2019	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	-102000	USD
CY2018	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	89000	USD
CY2019Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2541000	USD
CY2018Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2280000	USD
CY2019	tcbk	Ending Valuation Allowance EndingValuationAllowance	139000	USD
CY2018	tcbk	Ending Valuation Allowance EndingValuationAllowance	116000	USD
CY2019	tcbk	Ending Number Of Foreclosed Assets EndingNumberOfForeclosedAssets	6	Assets
CY2018	tcbk	Ending Number Of Foreclosed Assets EndingNumberOfForeclosedAssets	11	Assets
CY2019	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	1336000	USD
CY2018	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	2527000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	246000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	408000	USD
CY2018Q4	tcbk	Property Plant And Equipment Less Depreciation Gross PropertyPlantAndEquipmentLessDepreciationGross	88646000	USD
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	373000	USD
CY2018Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	701000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	87086000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	89347000	USD
CY2019	us-gaap	Depreciation Nonproduction DepreciationNonproduction	6472000	USD
CY2018	us-gaap	Depreciation Nonproduction DepreciationNonproduction	6104000	USD
CY2017	us-gaap	Depreciation Nonproduction DepreciationNonproduction	5686000	USD
CY2018Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	117318000	USD
CY2017Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	97783000	USD
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3029000	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2718000	USD
CY2019	us-gaap	Insured Event Gain Loss InsuredEventGainLoss	831000	USD
CY2019	tcbk	Insurance Proceeds Receivable Reclassified To Other Assets InsuranceProceedsReceivableReclassifiedToOtherAssets	3355000	USD
CY2019Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	117823000	USD
CY2018Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	117318000	USD
CY2019	tcbk	End Of Period Death Benefit EndOfPeriodDeathBenefit	199084000	USD
CY2018	tcbk	End Of Period Death Benefit EndOfPeriodDeathBenefit	200249000	USD
CY2019	tcbk	Number Of Policies Owned NumberOfPoliciesOwned	189	Policies
CY2018	tcbk	Number Of Policies Owned NumberOfPoliciesOwned	196	Policies
CY2019	tcbk	Insurance Companies Used InsuranceCompaniesUsed	14	Company
CY2018	tcbk	Insurance Companies Used InsuranceCompaniesUsed	14	Company
CY2019	tcbk	Current And Former Employees And Directors Covered CurrentAndFormerEmployeesAndDirectorsCovered	63	Employees
CY2018	tcbk	Current And Former Employees And Directors Covered CurrentAndFormerEmployeesAndDirectorsCovered	66	Employees
CY2019Q4	us-gaap	Goodwill Goodwill	220872000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2019	tcbk	Goodwill Other Reductions GoodwillOtherReductions	100000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	220972000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Lease Cost LeaseCost	5330000	USD
CY2019	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	1917000	USD
CY2018	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	2038000	USD
CY2017	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	2076000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	5228000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	262000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	-29000	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	131000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	6348000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5885000	USD
CY2018	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	42000	USD
CY2017	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	44000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	4931000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	32162000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y3M18D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.032
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4388000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4235000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	3896000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3216000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2937000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	13745000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	32417000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	4877000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	27540000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1832665000	USD
CY2018Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1760580000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	1242274000	USD
CY2018Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	1252366000	USD
CY2019Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1851549000	USD
CY2018Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1921324000	USD
CY2019Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	129061000	USD
CY2018Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	132429000	USD
CY2019Q4	tcbk	Other Time Certificates Deposits OtherTimeCertificatesDeposits	311445000	USD
CY2018Q4	tcbk	Other Time Certificates Deposits OtherTimeCertificatesDeposits	299767000	USD
CY2019Q4	us-gaap	Deposits Deposits	5366994000	USD
CY2018Q4	us-gaap	Deposits Deposits	5366466000	USD
CY2019Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	1550000	USD
CY2018Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	1469000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	340150000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	57076000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	38552000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	2798000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	1924000	USD
CY2019Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	6000	USD
CY2019Q4	us-gaap	Time Deposits TimeDeposits	440506000	USD
CY2019Q4	us-gaap	Other Borrowings OtherBorrowings	18454000	USD
CY2018Q4	us-gaap	Other Borrowings OtherBorrowings	15839000	USD
CY2019Q4	tcbk	Securities Sold Under Agreements To Collateralized SecuritiesSoldUnderAgreementsToCollateralized	48878000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Maximum Amount Available FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable	2257336000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Activity For Year Maximum Outstanding At Any Month End FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd	0	USD
CY2019Q4	tcbk	Loans Designated As Potential Collateral Under Collateralized Line Of Credit With Fhlb LoansDesignatedAsPotentialCollateralUnderCollateralizedLineOfCreditWithFhlb	160134000	USD
CY2019Q4	tcbk	Investment Securities Designated As Potential Collateral Under Collateral Line Of Credit With Fhlb InvestmentSecuritiesDesignatedAsPotentialCollateralUnderCollateralLineOfCreditWithFhlb	3070793000	USD
CY2019Q4	tcbk	Collateralized Line Of Credit With Federal Reserve Bank Maximum Borrowing Capacity CollateralizedLineOfCreditWithFederalReserveBankMaximumBorrowingCapacity	273395000	USD
CY2019Q4	tcbk	Collateralized Line Of Credit With Federal Reserve Bank Outstanding Balance CollateralizedLineOfCreditWithFederalReserveBankOutstandingBalance	0	USD
CY2019Q4	tcbk	Investment Securities Designated As Potential Collateral Under Collateral Line Of Credit With Frb InvestmentSecuritiesDesignatedAsPotentialCollateralUnderCollateralLineOfCreditWithFrb	10000	USD
CY2019Q4	tcbk	Loans Designated As Potential Collateral Under Collateral Line Of Credit With Frb LoansDesignatedAsPotentialCollateralUnderCollateralLineOfCreditWithFrb	273385000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	60000000	USD
CY2019	tcbk	Number Of Subsidiary Business Trust NumberOfSubsidiaryBusinessTrust	5	Trust
CY2019	tcbk	Number Of Subsidiary Business Trust NumberOfSubsidiaryBusinessTrust	5	Trust
CY2019	tcbk	Number Of Locations Organized NumberOfLocationsOrganized	2	Location
CY2019Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	62889000	USD
CY2019Q4	us-gaap	Junior Subordinated Notes JuniorSubordinatedNotes	57232000	USD
CY2018Q4	us-gaap	Junior Subordinated Notes JuniorSubordinatedNotes	57042000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	136370000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	119317000	USD
CY2019	tcbk	Commitments Expiration Date CommitmentsExpirationDate	one year or less or other termination clauses and may require payment of a fee
CY2019	tcbk	Letter Of Credit Issue Period LetterOfCreditIssuePeriod	one year or less
CY2019	tcbk	Overdraft Privilege Receivable Criteria OverdraftPrivilegeReceivableCriteria	all holders of such accounts who bring their accounts to a positive balance at least once every thirty days receive the overdraft privilege
CY2019	tcbk	Common Stock Conversion Ratio CommonStockConversionRatio	1.6228
CY2019	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	32669000	USD
CY2018	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	26432000	USD
CY2017	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	19236000	USD
CY2019Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	1525000	shares
CY2019Q4	tcbk	Stock Repurchase Program Percentage Of Common Stock StockRepurchaseProgramPercentageOfCommonStock	0.050
CY2018	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	196566	shares
CY2018	tcbk	Stock Repurchased During Period Fair Value Disclosure StockRepurchasedDuringPeriodFairValueDisclosure	968000	USD
CY2017	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0	shares
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0	shares
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	446400	shares
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.84
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	100400	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	16.97
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	3000	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	23.21
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	343000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.67
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	182500	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	16.00
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	160500	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	17.60
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	160500	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	17.60
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	3726000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y9M
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	4169000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2109000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2657000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	0	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	75000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	259000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	0	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	75000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	259000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	0	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	22000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	109000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	40417000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	38460000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	37423000	USD
CY2019	tcbk	Commissions On Sale Of Non Deposit Investment Products CommissionsOnSaleOfNonDepositInvestmentProducts	2877000	USD
CY2018	tcbk	Commissions On Sale Of Non Deposit Investment Products CommissionsOnSaleOfNonDepositInvestmentProducts	3151000	USD
CY2017	tcbk	Commissions On Sale Of Non Deposit Investment Products CommissionsOnSaleOfNonDepositInvestmentProducts	2729000	USD
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3029000	USD
CY2017	us-gaap	Equipment Expense EquipmentExpense	7141000	USD
CY2019	tcbk	Network Charges NetworkCharges	5447000	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2718000	USD
CY2017	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	2685000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3282000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	2371000	USD
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3109000	USD
CY2019	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	878000	USD
CY2018	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	678000	USD
CY2017	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	782000	USD
CY2019	tcbk	Sale Of Customer Checks SaleOfCustomerChecks	529000	USD
CY2018	tcbk	Sale Of Customer Checks SaleOfCustomerChecks	449000	USD
CY2017	tcbk	Sale Of Customer Checks SaleOfCustomerChecks	372000	USD
CY2019	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	110000	USD
CY2018	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	207000	USD
CY2017	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	961000	USD
CY2019	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	86000	USD
CY2018	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	-64000	USD
CY2017	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	0	USD
CY2019	us-gaap	Noninterest Income Other NoninterestIncomeOther	2312000	USD
CY2018	us-gaap	Noninterest Income Other NoninterestIncomeOther	1091000	USD
CY2017	us-gaap	Noninterest Income Other NoninterestIncomeOther	1391000	USD
CY2019	tcbk	Noninterest Income Excluding Service Charges And Fees NoninterestIncomeExcludingServiceChargesAndFees	13103000	USD
CY2018	tcbk	Noninterest Income Excluding Service Charges And Fees NoninterestIncomeExcludingServiceChargesAndFees	10601000	USD
CY2017	tcbk	Noninterest Income Excluding Service Charges And Fees NoninterestIncomeExcludingServiceChargesAndFees	12029000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	53520000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	49061000	USD
CY2017	us-gaap	Noninterest Income NoninterestIncome	49452000	USD
CY2019	tcbk	Change In Fair Value Of Mortgage Loan Servicing Rights ChangeInFairValueOfMortgageLoanServicingRights	106000	USD
CY2018	tcbk	Change In Fair Value Of Mortgage Loan Servicing Rights ChangeInFairValueOfMortgageLoanServicingRights	1892000	USD
CY2017	tcbk	Change In Fair Value Of Mortgage Loan Servicing Rights ChangeInFairValueOfMortgageLoanServicingRights	1358000	USD
CY2019	tcbk	Base Salaries Net Of Deferred Loan Origination Costs BaseSalariesNetOfDeferredLoanOriginationCosts	70218000	USD
CY2018	tcbk	Base Salaries Net Of Deferred Loan Origination Costs BaseSalariesNetOfDeferredLoanOriginationCosts	62422000	USD
CY2017	tcbk	Base Salaries Net Of Deferred Loan Origination Costs BaseSalariesNetOfDeferredLoanOriginationCosts	54589000	USD
CY2019	tcbk	Incentive Compensation Expense IncentiveCompensationExpense	13106000	USD
CY2018	tcbk	Incentive Compensation Expense IncentiveCompensationExpense	11147000	USD
CY2017	tcbk	Incentive Compensation Expense IncentiveCompensationExpense	9227000	USD
CY2019	tcbk	Other Benefits And Compensation Costs OtherBenefitsAndCompensationCosts	22741000	USD
CY2018	tcbk	Other Benefits And Compensation Costs OtherBenefitsAndCompensationCosts	20373000	USD
CY2017	tcbk	Other Benefits And Compensation Costs OtherBenefitsAndCompensationCosts	19114000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	106065000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	93942000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	82930000	USD
CY2019	us-gaap	Occupancy Net OccupancyNet	14893000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	12139000	USD
CY2017	us-gaap	Occupancy Net OccupancyNet	10894000	USD
CY2019	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	13517000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	11021000	USD
CY2017	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	10448000	USD
CY2019	us-gaap	Equipment Expense EquipmentExpense	7022000	USD
CY2018	us-gaap	Equipment Expense EquipmentExpense	6651000	USD
CY2018	tcbk	Network Charges NetworkCharges	5271000	USD
CY2017	tcbk	Network Charges NetworkCharges	4752000	USD
CY2019	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	0	USD
CY2018	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	5227000	USD
CY2017	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	530000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	5633000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	4578000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	4101000	USD
CY2019	us-gaap	Professional Fees ProfessionalFees	3754000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	3546000	USD
CY2017	us-gaap	Professional Fees ProfessionalFees	3745000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5723000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3499000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1389000	USD
CY2019	us-gaap	Communication Communication	3190000	USD
CY2018	us-gaap	Communication Communication	3023000	USD
CY2017	us-gaap	Communication Communication	2713000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	34750000	USD
CY2019	tcbk	Regulatory Assessments And Insurance RegulatoryAssessmentsAndInsurance	1188000	USD
CY2018	tcbk	Regulatory Assessments And Insurance RegulatoryAssessmentsAndInsurance	1906000	USD
CY2017	tcbk	Regulatory Assessments And Insurance RegulatoryAssessmentsAndInsurance	1676000	USD
CY2019	tcbk	Courier Service CourierService	1308000	USD
CY2018	tcbk	Courier Service CourierService	1287000	USD
CY2017	tcbk	Courier Service CourierService	1035000	USD
CY2019	tcbk	Operational Losses OperationalLosses	986000	USD
CY2018	tcbk	Operational Losses OperationalLosses	1260000	USD
CY2017	tcbk	Operational Losses OperationalLosses	1394000	USD
CY2019	us-gaap	Postage Expense PostageExpense	1258000	USD
CY2018	us-gaap	Postage Expense PostageExpense	1154000	USD
CY2017	us-gaap	Postage Expense PostageExpense	1296000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	246000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	408000	USD
CY2017	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	711000	USD
CY2019	tcbk	Foreclosed Assets Expense ForeclosedAssetsExpense	82000	USD
CY2018	tcbk	Foreclosed Assets Expense ForeclosedAssetsExpense	185000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25032000	USD
CY2017	tcbk	Foreclosed Assets Expense ForeclosedAssetsExpense	142000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	15637000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	14191000	USD
CY2017	us-gaap	Other Noninterest Expense OtherNoninterestExpense	12980000	USD
CY2019	tcbk	Noninterest Expense Excluding Labor And Related Expense NoninterestExpenseExcludingLaborAndRelatedExpense	79392000	USD
CY2018	tcbk	Noninterest Expense Excluding Labor And Related Expense NoninterestExpenseExcludingLaborAndRelatedExpense	74530000	USD
CY2017	tcbk	Noninterest Expense Excluding Labor And Related Expense NoninterestExpenseExcludingLaborAndRelatedExpense	63525000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	185457000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	168472000	USD
CY2017	us-gaap	Noninterest Expense NoninterestExpense	146455000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	20403000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	13109000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17835000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	12655000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9323000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6650000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	33058000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	22432000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	24485000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	695000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1842000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	11418000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	997000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	758000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1055000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1692000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2600000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12473000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36958000	USD
CY2017	tcbk	Tax Cuts And Jobs Act Of2017 Remeasurement Of Deferred Taxes Deferred Tax Expense Benefit TaxCutsAndJobsActOf2017RemeasurementOfDeferredTaxesDeferredTaxExpenseBenefit	7416000	USD
CY2017	tcbk	Tax Cuts And Jobs Act Of2017 Acceleration Of Amortization Expense On Low Income Housing Tax Credit Investments Deferred Tax Expense Benefit TaxCutsAndJobsActOf2017AccelerationOfAmortizationExpenseOnLowIncomeHousingTaxCreditInvestmentsDeferredTaxExpenseBenefit	226000	USD
CY2019	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	2546000	USD
CY2018	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1993000	USD
CY2017	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1753000	USD
CY2019	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	2705000	USD
CY2018	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1814000	USD
CY2017	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1611000	USD
CY2019Q4	tcbk	Investment In Low Income Housing Tax Credit Funds InvestmentInLowIncomeHousingTaxCreditFunds	28480000	USD
CY2018Q4	tcbk	Investment In Low Income Housing Tax Credit Funds InvestmentInLowIncomeHousingTaxCreditFunds	23885000	USD
CY2019Q4	tcbk	Low Income Housing Tax Credit Fund Commitments LowIncomeHousingTaxCreditFundCommitments	13137000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.079
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.086
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.069
CY2019	tcbk	Tax Cuts And Jobs Act Of2017 Remeasurement Of Deferred Tax Expense TaxCutsAndJobsActOf2017RemeasurementOfDeferredTaxExpense	0
CY2018	tcbk	Tax Cuts And Jobs Act Of2017 Remeasurement Of Deferred Tax Expense TaxCutsAndJobsActOf2017RemeasurementOfDeferredTaxExpense	0
CY2017	tcbk	Tax Cuts And Jobs Act Of2017 Remeasurement Of Deferred Tax Expense TaxCutsAndJobsActOf2017RemeasurementOfDeferredTaxExpense	0.096
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.007
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.010
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.019
CY2019	tcbk	Effective Income Tax Rate Reconciliation Tax Exempt Life Insurance Related Income EffectiveIncomeTaxRateReconciliationTaxExemptLifeInsuranceRelatedIncome	0.006
CY2018	tcbk	Effective Income Tax Rate Reconciliation Tax Exempt Life Insurance Related Income EffectiveIncomeTaxRateReconciliationTaxExemptLifeInsuranceRelatedIncome	0.006
CY2017	tcbk	Effective Income Tax Rate Reconciliation Tax Exempt Life Insurance Related Income EffectiveIncomeTaxRateReconciliationTaxExemptLifeInsuranceRelatedIncome	0.013
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.023
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.022
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.023
CY2019	tcbk	Effective Income Tax Rate Reconciliation Low Income Housing Tax Credits Amortization EffectiveIncomeTaxRateReconciliationLowIncomeHousingTaxCreditsAmortization	0.021
CY2018	tcbk	Effective Income Tax Rate Reconciliation Low Income Housing Tax Credits Amortization EffectiveIncomeTaxRateReconciliationLowIncomeHousingTaxCreditsAmortization	0.020
CY2017	tcbk	Effective Income Tax Rate Reconciliation Low Income Housing Tax Credits Amortization EffectiveIncomeTaxRateReconciliationLowIncomeHousingTaxCreditsAmortization	0.021
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.004
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.004
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.011
CY2019	tcbk	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger Expenses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerExpenses	0
CY2018	tcbk	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger Expenses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerExpenses	0.002
CY2017	tcbk	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger Expenses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerExpenses	0.002
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.008
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.005
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.274
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.268
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.477
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	9871000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	10394000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	2342000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	2780000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	3309000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	9734000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1678000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1175000	USD
CY2019Q4	tcbk	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Additional Minimum Pension Liability DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsAdditionalMinimumPensionLiability	9868000	USD
CY2018Q4	tcbk	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Additional Minimum Pension Liability DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsAdditionalMinimumPensionLiability	1420000	USD
CY2019Q4	tcbk	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	8142000	USD
CY2019Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	2441000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	469000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	582000	USD
CY2018Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	1864000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	803000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1132000	USD
CY2019Q4	tcbk	Deferred Tax Assets Nonaccrual Interest DeferredTaxAssetsNonaccrualInterest	649000	USD
CY2018Q4	tcbk	Deferred Tax Assets Nonaccrual Interest DeferredTaxAssetsNonaccrualInterest	814000	USD
CY2019Q4	tcbk	Deferred Tax Assets Acquisition Cost Basis DeferredTaxAssetsAcquisitionCostBasis	4556000	USD
CY2018Q4	tcbk	Deferred Tax Assets Acquisition Cost Basis DeferredTaxAssetsAcquisitionCostBasis	6714000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	6201000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	576000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	623000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1578000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2442000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	348000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	423000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	46161000	USD
CY2019Q4	tcbk	Deferred Tax Liability Right Of Use Asset DeferredTaxLiabilityRightOfUseAsset	8242000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	45716000	USD
CY2019Q4	tcbk	Deferred Tax Liabilities Securities Income DeferredTaxLiabilitiesSecuritiesIncome	762000	USD
CY2018Q4	tcbk	Deferred Tax Liabilities Securities Income DeferredTaxLiabilitiesSecuritiesIncome	1020000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	6109000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5572000	USD
CY2019Q4	tcbk	Deferred Tax Liabilities Merger Related Fixed Asset Valuations DeferredTaxLiabilitiesMergerRelatedFixedAssetValuations	30000	USD
CY2018Q4	tcbk	Deferred Tax Liabilities Merger Related Fixed Asset Valuations DeferredTaxLiabilitiesMergerRelatedFixedAssetValuations	26000	USD
CY2019Q4	tcbk	Deferred Tax Liabilities Securities Accretion DeferredTaxLiabilitiesSecuritiesAccretion	560000	USD
CY2018Q4	tcbk	Deferred Tax Liabilities Securities Accretion DeferredTaxLiabilitiesSecuritiesAccretion	426000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	1813000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	2073000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	6453000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	8234000	USD
CY2019Q4	tcbk	Deferred Tax Liabilities Junior Subordinated Debt DeferredTaxLiabilitiesJuniorSubordinatedDebt	1672000	USD
CY2018Q4	tcbk	Deferred Tax Liabilities Junior Subordinated Debt DeferredTaxLiabilitiesJuniorSubordinatedDebt	1729000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	27111000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	19662000	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	19050000	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	26054000	USD
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	338000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	30645000	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	92072000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	68320000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	40554000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	30478000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26593000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	22912000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	167000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	287000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26880000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	23250000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	10056000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	24471000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-17057000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	6422000	USD
CY2019	us-gaap	Debt Securities Trading Realized Gain DebtSecuritiesTradingRealizedGain	110000	USD
CY2018	us-gaap	Debt Securities Trading Realized Gain DebtSecuritiesTradingRealizedGain	207000	USD
CY2017	us-gaap	Debt Securities Trading Realized Gain DebtSecuritiesTradingRealizedGain	961000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-110000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-570000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-961000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	24361000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-17627000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	5461000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	7202000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-5193000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2296000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	17159000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-12434000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	3165000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	6745000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	-762000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	1016000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-54000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	6391000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-550000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-54000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-12000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-408000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-510000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-390000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	354000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-212000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	378000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	638000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1889000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-162000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	268000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4502000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-388000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	370000	USD
CY2019	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Reclassification Net Of Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsReclassificationNetOfTax	0	USD
CY2018	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Reclassification Net Of Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsReclassificationNetOfTax	426000	USD
CY2017	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Reclassification Net Of Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsReclassificationNetOfTax	-110000	USD
CY2019	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Before Reclassification And Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsBeforeReclassificationAndTax	0	USD
CY2018	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Before Reclassification And Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsBeforeReclassificationAndTax	426000	USD
CY2017	tcbk	Other Comprehensive Income Loss Joint Beneficiary Agreement Liability Adjustments Before Reclassification And Tax OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsBeforeReclassificationAndTax	-110000	USD
CY2019	tcbk	Other Comprehensive Income Loss Changes In Joint Beneficiary Agreement Liability Tax OtherComprehensiveIncomeLossChangesInJointBeneficiaryAgreementLiabilityTax	0	USD
CY2018	tcbk	Other Comprehensive Income Loss Changes In Joint Beneficiary Agreement Liability Tax OtherComprehensiveIncomeLossChangesInJointBeneficiaryAgreementLiabilityTax	0	USD
CY2017	tcbk	Other Comprehensive Income Loss Changes In Joint Beneficiary Agreement Liability Tax OtherComprehensiveIncomeLossChangesInJointBeneficiaryAgreementLiabilityTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	12657000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-11620000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2685000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-5222000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-17879000	USD
CY2019	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	2500000	USD
CY2018	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1887000	USD
CY2017	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	2149000	USD
CY2019	us-gaap	Employee Stock Ownership Plan Esop Cash Contributions To Esop EmployeeStockOwnershipPlanESOPCashContributionsToESOP	1875000	USD
CY2018	us-gaap	Employee Stock Ownership Plan Esop Cash Contributions To Esop EmployeeStockOwnershipPlanESOPCashContributionsToESOP	1952000	USD
CY2017	us-gaap	Employee Stock Ownership Plan Esop Cash Contributions To Esop EmployeeStockOwnershipPlanESOPCashContributionsToESOP	2073000	USD
CY2019Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	7923000	USD
CY2018Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	9402000	USD
CY2019	tcbk	Deferred Compensation Arrangements Non Interest Expense DeferredCompensationArrangementsNonInterestExpense	363000	USD
CY2018	tcbk	Deferred Compensation Arrangements Non Interest Expense DeferredCompensationArrangementsNonInterestExpense	462000	USD
CY2017	tcbk	Deferred Compensation Arrangements Non Interest Expense DeferredCompensationArrangementsNonInterestExpense	478000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	11193000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	4802000	USD
CY2018Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	1420000	USD
CY2019	tcbk	Change In Net Actuarial Gain Loss ChangeInNetActuarialGainLoss	2984000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsBeforeTax	-1000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsBeforeTax	-3000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	-141000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax	-194000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	-11333000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax	-4993000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	11193000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Before Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax	4802000	USD
CY2019Q4	tcbk	Defined Benefit Plan Accumulated Other Comprehensive Income Deferred Income Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeDeferredIncomeTax	3309000	USD
CY2018Q4	tcbk	Defined Benefit Plan Accumulated Other Comprehensive Income Deferred Income Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeDeferredIncomeTax	1420000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	7884000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	3382000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	29196000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	28472000	USD
CY2019	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	879000	USD
CY2018	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	973000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1131000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	949000	USD
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-6747000	USD
CY2018	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	92000	USD
CY2019	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	0	USD
CY2018	us-gaap	Defined Benefit Plan Plan Amendments DefinedBenefitPlanPlanAmendments	0	USD
CY2019	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1216000	USD
CY2018	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1106000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	36737000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	29196000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	0	USD
CY2017Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	0	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	0	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	0	USD
CY2019Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-36737000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	-29196000	USD
CY2019Q4	tcbk	Defined Benefit Plan Net Transition Obligations Assets Not Yet Recognized DefinedBenefitPlanNetTransitionObligationsAssetsNotYetRecognized	1000	USD
CY2018Q4	tcbk	Defined Benefit Plan Net Transition Obligations Assets Not Yet Recognized DefinedBenefitPlanNetTransitionObligationsAssetsNotYetRecognized	3000	USD
CY2019Q4	tcbk	Defined Benefit Plan Net Actuarial Gains Losses Not Yet Recognized DefinedBenefitPlanNetActuarialGainsLossesNotYetRecognized	-11333000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	1131000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	949000	USD
CY2017	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	991000	USD
CY2018Q4	tcbk	Defined Benefit Plan Net Actuarial Gains Losses Not Yet Recognized DefinedBenefitPlanNetActuarialGainsLossesNotYetRecognized	-4993000	USD
CY2019Q4	tcbk	Defined Benefit Plan Net Prior Service Costs Credits Not Yet Recognized DefinedBenefitPlanNetPriorServiceCostsCreditsNotYetRecognized	-141000	USD
CY2018Q4	tcbk	Defined Benefit Plan Net Prior Service Costs Credits Not Yet Recognized DefinedBenefitPlanNetPriorServiceCostsCreditsNotYetRecognized	-194000	USD
CY2019Q4	tcbk	Defined Benefit Plan Accumulated Other Comprehensive Income Minimum Pension Liability Before Tax1 DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeMinimumPensionLiabilityBeforeTax1	11193000	USD
CY2018Q4	tcbk	Defined Benefit Plan Accumulated Other Comprehensive Income Minimum Pension Liability Before Tax1 DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeMinimumPensionLiabilityBeforeTax1	4802000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	-36737000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	-29196000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	35981000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	27544000	USD
CY2019	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	879000	USD
CY2018	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	973000	USD
CY2017	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	941000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Transition Asset Obligation DefinedBenefitPlanAmortizationOfTransitionAssetObligation	-2000	USD
CY2018	us-gaap	Defined Benefit Plan Amortization Of Transition Asset Obligation DefinedBenefitPlanAmortizationOfTransitionAssetObligation	-2000	USD
CY2017	us-gaap	Defined Benefit Plan Amortization Of Transition Asset Obligation DefinedBenefitPlanAmortizationOfTransitionAssetObligation	-2000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-54000	USD
CY2018	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-54000	USD
CY2017	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-12000	USD
CY2019	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-408000	USD
CY2018	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-510000	USD
CY2017	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-390000	USD
CY2019	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	2366000	USD
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	2380000	USD
CY2017	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	2312000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0282
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0396
CY2017Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0340
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0396
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0340
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0380
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	1555000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	1555000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	2128000	USD
CY2019Q4	tcbk	Defined Benefit Plan Estimated Future Employer Contributions In Year Two DefinedBenefitPlanEstimatedFutureEmployerContributionsInYearTwo	2128000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	2179000	USD
CY2019Q4	tcbk	Defined Benefit Plan Estimated Future Employer Contributions In Year Three DefinedBenefitPlanEstimatedFutureEmployerContributionsInYearThree	2179000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	2179000	USD
CY2019Q4	tcbk	Defined Benefit Plan Estimated Future Employer Contributions In Year Four DefinedBenefitPlanEstimatedFutureEmployerContributionsInYearFour	2179000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	2191000	USD
CY2019Q4	tcbk	Defined Benefit Plan Estimated Future Employer Contributions In Year Five DefinedBenefitPlanEstimatedFutureEmployerContributionsInYearFive	2193000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	10956000	USD
CY2019Q4	tcbk	Defined Benefit Plan Estimated Future Employer Contributions Five Fiscal Years Thereafter DefinedBenefitPlanEstimatedFutureEmployerContributionsFiveFiscalYearsThereafter	10956000	USD
CY2019Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	41647000	USD
CY2018Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	43881000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni Restricted EquitySecuritiesFvNiRestricted	0	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni Restricted EquitySecuritiesFvNiRestricted	0	USD
CY2018Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	7098000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	6200000	USD
CY2018Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	7098000	USD
CY2019Q4	tcbk	Loan Charged Off Carrying Value LoanChargedOffCarryingValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	1000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2018Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30523824	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	30523824	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	30417223	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	30417223	shares
CY2019Q4	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	2218000	USD
CY2019Q3	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	2360000	USD
CY2019Q2	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	1904000	USD
CY2019Q1	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	1655000	USD
CY2019Q4	tcbk	All Other Loan Interest Income AllOtherLoanInterestIncome	54644000	USD
CY2019Q3	tcbk	All Other Loan Interest Income AllOtherLoanInterestIncome	54639000	USD
CY2019Q2	tcbk	All Other Loan Interest Income AllOtherLoanInterestIncome	53587000	USD
CY2019Q1	tcbk	All Other Loan Interest Income AllOtherLoanInterestIncome	52743000	USD
CY2019Q4	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	56862000	USD
CY2019Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	56999000	USD
CY2019Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	55491000	USD
CY2019Q1	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	54398000	USD
CY2019Q4	tcbk	Debt Securities Dividends And Interest Bearing Cash At Banks DebtSecuritiesDividendsAndInterestBearingCashAtBanks	11056000	USD
CY2019Q3	tcbk	Debt Securities Dividends And Interest Bearing Cash At Banks DebtSecuritiesDividendsAndInterestBearingCashAtBanks	11890000	USD
CY2019Q2	tcbk	Debt Securities Dividends And Interest Bearing Cash At Banks DebtSecuritiesDividendsAndInterestBearingCashAtBanks	12689000	USD
CY2019Q1	tcbk	Debt Securities Dividends And Interest Bearing Cash At Banks DebtSecuritiesDividendsAndInterestBearingCashAtBanks	13059000	USD
CY2019Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	67918000	USD
CY2019Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	68889000	USD
CY2019Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	68180000	USD
CY2019Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	67457000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	3722000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	4201000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	3865000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	3587000	USD
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	64196000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	64688000	USD
CY2019Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	64315000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	63870000	USD
CY2019Q4	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	-298000	USD
CY2019Q3	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	-329000	USD
CY2019Q2	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	537000	USD
CY2019Q1	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	-1600000	USD
CY2019Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	64494000	USD
CY2019Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	65017000	USD
CY2019Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	63778000	USD
CY2019Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	65470000	USD
CY2019Q4	us-gaap	Noninterest Income NoninterestIncome	14186000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	14108000	USD
CY2019Q2	us-gaap	Noninterest Income NoninterestIncome	13423000	USD
CY2019Q1	us-gaap	Noninterest Income NoninterestIncome	11803000	USD
CY2019Q4	us-gaap	Noninterest Expense NoninterestExpense	46964000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	46344000	USD
CY2019Q2	us-gaap	Noninterest Expense NoninterestExpense	46697000	USD
CY2019Q1	us-gaap	Noninterest Expense NoninterestExpense	45452000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	31716000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	32781000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	30504000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	31821000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8826000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9386000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7443000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9095000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	22890000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	23395000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	23061000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	22726000	USD
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
CY2019Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.22
CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.22
CY2019Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.19
CY2019Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.19
CY2018Q4	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	1982000	USD
CY2018Q3	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	2098000	USD
CY2018Q2	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	559000	USD
CY2018Q1	srt	Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount	632000	USD
CY2018Q4	tcbk	All Other Loan Interest Income AllOtherLoanInterestIncome	53680000	USD
CY2018Q3	tcbk	All Other Loan Interest Income AllOtherLoanInterestIncome	51004000	USD
CY2018Q2	tcbk	All Other Loan Interest Income AllOtherLoanInterestIncome	38745000	USD
CY2018Q1	tcbk	All Other Loan Interest Income AllOtherLoanInterestIncome	37417000	USD
CY2018Q4	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	55662000	USD
CY2018Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	53102000	USD
CY2018Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	39304000	USD
CY2018Q1	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	38049000	USD
CY2018Q4	tcbk	Debt Securities Dividends And Interest Bearing Cash At Banks DebtSecuritiesDividendsAndInterestBearingCashAtBanks	12403000	USD
CY2018Q3	tcbk	Debt Securities Dividends And Interest Bearing Cash At Banks DebtSecuritiesDividendsAndInterestBearingCashAtBanks	11452000	USD
CY2018Q2	tcbk	Debt Securities Dividends And Interest Bearing Cash At Banks DebtSecuritiesDividendsAndInterestBearingCashAtBanks	9174000	USD
CY2018Q1	tcbk	Debt Securities Dividends And Interest Bearing Cash At Banks DebtSecuritiesDividendsAndInterestBearingCashAtBanks	9072000	USD
CY2018Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	68065000	USD
CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	64554000	USD
CY2018Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	48478000	USD
CY2018Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	47121000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	4063000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	4065000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	2609000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	2135000	USD
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	64002000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	60489000	USD
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	45869000	USD
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	44986000	USD
CY2018Q4	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	806000	USD
CY2018Q3	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	2651000	USD
CY2018Q2	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	-638000	USD
CY2018Q1	tcbk	Provision For Benefit From Loan Losses Expensed ProvisionForBenefitFromLoanLossesExpensed	-236000	USD
CY2018Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	63196000	USD
CY2018Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	57838000	USD
CY2018Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	46507000	USD
CY2018Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	45222000	USD
CY2018Q4	us-gaap	Noninterest Income NoninterestIncome	12634000	USD
CY2018Q3	us-gaap	Noninterest Income NoninterestIncome	12186000	USD
CY2018Q2	us-gaap	Noninterest Income NoninterestIncome	12174000	USD
CY2018Q1	us-gaap	Noninterest Income NoninterestIncome	12290000	USD
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	45285000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	47378000	USD
CY2018Q2	us-gaap	Noninterest Expense NoninterestExpense	37870000	USD
CY2018Q1	us-gaap	Noninterest Expense NoninterestExpense	38162000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	30545000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	22646000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	20811000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	19350000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7334000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6476000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5782000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5440000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	23211000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	16170000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	15029000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	13910000	USD
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.53
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.65
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2018Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.19
CY2018Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.17
CY2018Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.17

Files In Submission

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$TCBK
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2018 Q4 Form 10-K Financial Statement

#000035617120000021 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TCBK TRICO BANCSHARES / Stock $tcbk

2018 Q4 Form 10-K Financial Statement

#000035617120000021 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TCBK
TRICO BANCSHARES / Stock $tcbk