$COLB
COLUMBIA BANKING SYSTEM, INC. Stock $colb

$colb Overview Financials Valuation SEC Filings Company Website

2024 Q4 Form 10-Q Financial Statement

#000088734324000262 Filed on November 05, 2024

Income Statement

Concept	2024 Q4	2024 Q3
Revenue		$698.9M
YoY Change		0.41%
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		$36.52M
YoY Change		-7.07%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$268.7M
YoY Change		24.89%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income		$196.3M
YoY Change		6.66%
Income Tax		$50.07M
% Of Pretax Income		25.51%
Net Earnings		$146.2M
YoY Change		7.61%
Net Earnings / Revenue		20.92%
Basic Earnings Per Share		$0.70
Diluted Earnings Per Share		$0.70
COMMON SHARES
Basic Shares Outstanding	209.5M shares	209.5M shares
Diluted Shares Outstanding		209.5M shares

Balance Sheet

Concept	2024 Q4	2024 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents		$2.111B
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		$338.1M
YoY Change		0.07%
Goodwill		$1.000B
YoY Change		0.0%
Intangibles		$513.3M
YoY Change		-19.4%
Long-Term Investments
YoY Change
Other Assets		$286.4M
YoY Change		-39.06%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets		$51.91B
YoY Change		-0.16%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses		$121.3M
YoY Change		-6.69%
Deferred Revenue
YoY Change
Short-Term Debt		$183.8M
YoY Change		425.24%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$305.1M
YoY Change		-21.36%
LONG-TERM LIABILITIES
Long-Term Debt		$419.6M
YoY Change		-90.51%
Other Long-Term Liabilities		$745.3M
YoY Change		-19.42%
Total Long-Term Liabilities		$1.165B
YoY Change		-78.22%
TOTAL LIABILITIES
Total Short-Term Liabilities		$305.1M
Total Long-Term Liabilities		$1.165B
Total Liabilities		$46.63B
YoY Change		-1.53%
SHAREHOLDERS EQUITY
Retained Earnings		-$304.5M
YoY Change		-37.29%
Common Stock		$5.812B
YoY Change		0.24%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity		$5.274B
YoY Change
Total Liabilities & Shareholders Equity		$51.91B
YoY Change		-0.16%

Cashflow Statement

Concept	2024 Q4	2024 Q3
OPERATING ACTIVITIES
Net Income		$146.2M
YoY Change		7.61%
Depreciation, Depletion And Amortization		$36.52M
YoY Change		-7.07%
Cash From Operating Activities		$67.22M
YoY Change		-80.8%
INVESTING ACTIVITIES
Capital Expenditures		$7.659M
YoY Change
Acquisitions
YoY Change
Other Investing Activities		$330.3M
YoY Change		44.57%
Cash From Investing Activities		$322.7M
YoY Change		39.09%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities		-347.7M
YoY Change		-78.07%
NET CHANGE
Cash From Operating Activities		67.22M
Cash From Investing Activities		322.7M
Cash From Financing Activities		-347.7M
Net Change In Cash		42.19M
YoY Change		-104.2%
FREE CASH FLOW
Cash From Operating Activities		$67.22M
Capital Expenditures		$7.659M
Free Cash Flow		$59.56M
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2024
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WA
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	91-1422237
	dei	Entity Address Address Line1 EntityAddressAddressLine1	1301 A Street
	dei	Entity Address City Or Town EntityAddressCityOrTown	Tacoma
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98402-2156
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2024Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	209531207	shares
CY2024Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	8611000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	4200000	usd
CY2024Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	591364000	usd
CY2023Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	498496000	usd
CY2024Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	4745000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	900000	usd
CY2024Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	1519658000	usd
CY2023Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	1664038000	usd
CY2024Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2111022000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2162534000	usd
CY2024Q3	colb	Equityand Other Investment Securities EquityandOtherInvestmentSecurities	79996000	usd
CY2023Q4	colb	Equityand Other Investment Securities EquityandOtherInvestmentSecurities	76995000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8676807000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8829870000	usd
CY2024Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2159000	usd
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2300000	usd
CY2024Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	66639000	usd
CY2023Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	30715000	usd
CY2024Q3	colb	Fair Value Portfolio Loans FairValuePortfolioLoans	179617000	usd
CY2023Q4	colb	Fair Value Portfolio Loans FairValuePortfolioLoans	275140000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	37503002000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	37441951000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	37082948000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	37001080000	usd
CY2024Q3	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	116274000	usd
CY2023Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	179274000	usd
CY2024Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	338107000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	338970000	usd
CY2024Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	106224000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	115811000	usd
CY2024Q3	us-gaap	Goodwill Goodwill	1029234000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	1029234000	usd
CY2024Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	513303000	usd
CY2024Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	101919000	usd
CY2023Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	109243000	usd
CY2024Q3	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	691160000	usd
CY2023Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	680948000	usd
CY2023Q4	us-gaap	Assets Assets	52173596000	usd
CY2024Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	13534065000	usd
CY2023Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	14256452000	usd
CY2024Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	27980623000	usd
CY2023Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	27350568000	usd
CY2024Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	183833000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	252119000	usd
CY2024Q3	us-gaap	Other Borrowings OtherBorrowings	3650000000	usd
CY2023Q4	us-gaap	Other Borrowings OtherBorrowings	3950000000	usd
CY2024Q3	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	311896000	usd
CY2023Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	316440000	usd
CY2024Q3	colb	Junior Subordinated Debentures At Amortized Cost JuniorSubordinatedDebenturesAtAmortizedCost	107725000	usd
CY2023Q4	colb	Junior Subordinated Debentures At Amortized Cost JuniorSubordinatedDebenturesAtAmortizedCost	107895000	usd
CY2024Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	121298000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	130576000	usd
CY2024Q3	us-gaap	Other Liabilities OtherLiabilities	745331000	usd
CY2023Q4	us-gaap	Other Liabilities OtherLiabilities	814512000	usd
CY2024Q3	us-gaap	Liabilities Liabilities	46634771000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	47178562000	usd
CY2024Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	19827000	usd
CY2023Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	88400000	usd
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	City Area Code CityAreaCode	253
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2023Q4	us-gaap	Other Assets OtherAssets	665740000	usd
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2024Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	520000000	shares
CY2024Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	209531882	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	208584667	shares
CY2024Q3	us-gaap	Common Stock Value CommonStockValue	5812237000	usd
CY2024Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-233884000	usd
CY2024Q3	us-gaap	Stockholders Equity StockholdersEquity	5273828000	usd
CY2024Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	51908599000	usd
CY2023Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	569670000	usd
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	1747521000	usd
CY2024Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	76074000	usd
CY2023Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	80066000	usd
CY2024Q3	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	6855000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	106258000	usd
	dei	Entity Central Index Key EntityCentralIndexKey	0000887343
	dei	Document Period End Date DocumentPeriodEndDate	2024-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity Registrant Name EntityRegistrantName	COLUMBIA BANKING SYSTEM, INC.
	dei	Local Phone Number LocalPhoneNumber	305-1900
	dei	Security12b Title Security12bTitle	Common Stock, No Par Value
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2024Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	420054000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	440871000	usd
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CY2024Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	286432000	usd
CY2024Q3	us-gaap	Other Assets OtherAssets	706375000	usd
CY2024Q3	us-gaap	Assets Assets	51908599000	usd
CY2024Q3	us-gaap	Deposits Deposits	41514688000	usd
CY2023Q4	us-gaap	Deposits Deposits	41607020000	usd
	dei	Trading Symbol TradingSymbol	COLB
CY2024Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
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CY2024Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	209531882	shares
CY2024Q3	us-gaap	Dividend Income Operating DividendIncomeOperating	2681000	usd
CY2024Q3	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	24683000	usd
CY2024Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	698896000	usd
CY2024Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	208027000	usd
CY2024Q3	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	1121000	usd
CY2024Q3	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	9894000	usd
CY2024Q3	us-gaap	Interest Expense InterestExpense	268678000	usd
CY2024Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	430218000	usd
CY2024Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	28769000	usd
CY2024Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	401449000	usd
CY2024Q3	colb	Residential Mortgage Banking Revenue Loss Net ResidentialMortgageBankingRevenueLossNet	6668000	usd
CY2024Q3	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	3000	usd
CY2024Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	161000	usd
CY2024Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4674000	usd
CY2024Q3	us-gaap	Noninterest Income NoninterestIncome	66159000	usd
CY2024Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	147268000	usd
CY2024Q3	us-gaap	Occupancy Net OccupancyNet	45056000	usd
CY2024Q3	us-gaap	Communication Communication	3322000	usd
CY2024Q3	us-gaap	Marketing Expense MarketingExpense	3078000	usd
CY2024Q3	us-gaap	Professional Fees ProfessionalFees	15013000	usd
CY2024Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	9332000	usd
CY2024Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29055000	usd
CY2024Q3	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	2364000	usd
CY2024Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	16870000	usd
CY2024Q3	us-gaap	Noninterest Expense NoninterestExpense	271358000	usd
CY2024Q3	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	196250000	usd
CY2024Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50068000	usd
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CY2024Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	3000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	1000	usd
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CY2024Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-536000	usd
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CY2024Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
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CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	208584667	shares
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CY2024Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-304525000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-467571000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-340142000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	4995034000	usd
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CY2024Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	588603000	usd
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	1535874000	usd
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	229919000	usd
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	198831000	usd
CY2023Q3	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	6929000	usd
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	20663000	usd
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	17143000	usd
CY2023Q3	us-gaap	Dividend Income Operating DividendIncomeOperating	4941000	usd
	us-gaap	Dividend Income Operating DividendIncomeOperating	9283000	usd
	us-gaap	Dividend Income Operating DividendIncomeOperating	8241000	usd
CY2023Q3	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	34407000	usd
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	71271000	usd
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	87604000	usd
CY2023Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	696013000	usd
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	2078657000	usd
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	1847693000	usd
CY2023Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	126974000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	613769000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	290995000	usd
CY2023Q3	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	1220000	usd
	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	3902000	usd
	us-gaap	Interest Expense Federal Funds Purchased And Securities Sold Under Agreements To Repurchase InterestExpenseFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	2697000	usd
CY2024Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	49636000	usd
CY2023Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	77080000	usd
	us-gaap	Interest Expense Debt InterestExpenseDebt	150329000	usd
	us-gaap	Interest Expense Debt InterestExpenseDebt	186848000	usd
CY2023Q3	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	9864000	usd
	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	29628000	usd
	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	27605000	usd
CY2023Q3	us-gaap	Interest Expense InterestExpense	215138000	usd
	us-gaap	Interest Expense InterestExpense	797628000	usd
	us-gaap	Interest Expense InterestExpense	508145000	usd
CY2023Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	480875000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1281029000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1339548000	usd
CY2023Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	36737000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	77725000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	158290000	usd
CY2023Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	444138000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1203304000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1181258000	usd
CY2023Q3	colb	Residential Mortgage Banking Revenue Loss Net ResidentialMortgageBankingRevenueLossNet	7103000	usd
	colb	Residential Mortgage Banking Revenue Loss Net ResidentialMortgageBankingRevenueLossNet	17150000	usd
	colb	Residential Mortgage Banking Revenue Loss Net ResidentialMortgageBankingRevenueLossNet	12577000	usd
CY2023Q3	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	4000	usd
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	14000	usd
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	4000	usd
CY2024Q3	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	2272000	usd
CY2023Q3	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-2055000	usd
	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	1032000	usd
	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-336000	usd
CY2023Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1871000	usd
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	-1134000	usd
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3253000	usd
CY2023Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4440000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	14018000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	11293000	usd
CY2024Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	14158000	usd
CY2023Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	-5117000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	19625000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	12297000	usd
CY2023Q3	us-gaap	Noninterest Income NoninterestIncome	43981000	usd
	us-gaap	Noninterest Income NoninterestIncome	161219000	usd
	us-gaap	Noninterest Income NoninterestIncome	138394000	usd
CY2023Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	159041000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	446872000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	458531000	usd
CY2023Q3	us-gaap	Occupancy Net OccupancyNet	43070000	usd
	us-gaap	Occupancy Net OccupancyNet	135494000	usd
	us-gaap	Occupancy Net OccupancyNet	135320000	usd
CY2023Q3	us-gaap	Communication Communication	4589000	usd
	us-gaap	Communication Communication	10512000	usd
	us-gaap	Communication Communication	11972000	usd
CY2023Q3	us-gaap	Marketing Expense MarketingExpense	2886000	usd
	us-gaap	Marketing Expense MarketingExpense	7319000	usd
	us-gaap	Marketing Expense MarketingExpense	5882000	usd
CY2023Q3	us-gaap	Professional Fees ProfessionalFees	14341000	usd
	us-gaap	Professional Fees ProfessionalFees	43035000	usd
	us-gaap	Professional Fees ProfessionalFees	41278000	usd
CY2023Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	11200000	usd
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	33456000	usd
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	28892000	usd
CY2023Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29879000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	90376000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	78092000	usd
CY2023Q3	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	18938000	usd
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	21483000	usd
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	164485000	usd
CY2023Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20203000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	49571000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	51072000	usd
CY2023Q3	us-gaap	Noninterest Expense NoninterestExpense	304147000	usd
	us-gaap	Noninterest Expense NoninterestExpense	838118000	usd
	us-gaap	Noninterest Expense NoninterestExpense	975524000	usd
CY2023Q3	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	183972000	usd
	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	526405000	usd
	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	344128000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	48127000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	135999000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88944000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	146182000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	135845000	usd
	us-gaap	Net Income Loss NetIncomeLoss	390406000	usd
	us-gaap	Net Income Loss NetIncomeLoss	255184000	usd
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.65
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.34
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.65
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208070000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208435000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	190997000	shares
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	209454000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	208645000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	209137000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	191546000	shares
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	135845000	usd
	us-gaap	Net Income Loss NetIncomeLoss	390406000	usd
	us-gaap	Net Income Loss NetIncomeLoss	255184000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-333993000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	139539000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-334298000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-86837000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	36280000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-86904000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	4000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	14000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	4000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	1000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	4000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	1000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-247159000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	103249000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-247397000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-19677000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	4008000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-8503000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-5116000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	1042000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	-2211000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-1525000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-14561000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	2966000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-6292000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-72000	usd
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-58000	usd
	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-168000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-19000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-15000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-44000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-53000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-43000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-124000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-261667000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-253565000	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-125822000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	496664000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1619000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2479826000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	-14038000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	126730000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	2337632000	usd
CY2023Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5644000	usd
CY2023Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	5216000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2023Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.35
CY2023Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	45855000	usd
CY2023Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4884723000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	133377000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-118628000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	1646000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	1646000	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3335000	usd
CY2023Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	742000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2023Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.36
CY2023Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	75523000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4828188000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	135845000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-261667000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4338000	usd
CY2023Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	148000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1185000	usd
CY2023Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.36
CY2023Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	75579000	usd
CY2023Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4632162000	usd
CY2023Q4	us-gaap	Net Income Loss NetIncomeLoss	93531000	usd
CY2023Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	340287000	usd
CY2023Q4	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4756000	usd
CY2023Q4	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	176000	usd
CY2023Q4	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2023Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.36
CY2023Q4	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	75526000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4995034000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4995034000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	124080000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-85989000	usd
CY2024Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4422000	usd
CY2024Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	4847000	usd
CY2024Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2024Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.36
CY2024Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	75455000	usd
CY2024Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4957245000	usd
CY2024Q2	us-gaap	Net Income Loss NetIncomeLoss	120144000	usd
CY2024Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-29551000	usd
CY2024Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5486000	usd
CY2024Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	767000	usd
CY2024Q2	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2024Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.36
CY2024Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	75885000	usd
CY2024Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4976672000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	146182000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	221798000	usd
CY2024Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5216000	usd
CY2024Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	20000	usd
CY2024Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	usd
CY2024Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.36
CY2024Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	76020000	usd
CY2024Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5273828000	usd
	us-gaap	Net Income Loss NetIncomeLoss	390406000	usd
	us-gaap	Net Income Loss NetIncomeLoss	255184000	usd
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	59383000	usd
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	47972000	usd
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	14000	usd
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	4000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	77725000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	158290000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	14177000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	11484000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	113642000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	102409000	usd
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2735000	usd
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	27438000	usd
	colb	Increase In Mortgage Servicing Rights Carried At Fair Value IncreaseInMortgageServicingRightsCarriedAtFairValue	4324000	usd
	colb	Increase In Mortgage Servicing Rights Carried At Fair Value IncreaseInMortgageServicingRightsCarriedAtFairValue	4427000	usd
	colb	Change In Fair Value Of Residential Mortgage Servicing Rights Carried At Fair Value ChangeInFairValueOfResidentialMortgageServicingRightsCarriedAtFairValue	-11648000	usd
	colb	Change In Fair Value Of Residential Mortgage Servicing Rights Carried At Fair Value ChangeInFairValueOfResidentialMortgageServicingRightsCarriedAtFairValue	-14350000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	15124000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	13317000	usd
	colb	Increase Decreasein Equity Securities IncreaseDecreaseinEquitySecurities	1969000	usd
	colb	Increase Decreasein Equity Securities IncreaseDecreaseinEquitySecurities	-273000	usd
	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	1032000	usd
	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-336000	usd
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	5464000	usd
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	7715000	usd
	us-gaap	Increase Decrease In Mortgage Loans Held For Sale IncreaseDecreaseInMortgageLoansHeldForSale	1006000	usd
	us-gaap	Increase Decrease In Mortgage Loans Held For Sale IncreaseDecreaseInMortgageLoansHeldForSale	-1118000	usd
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	388872000	usd
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	354535000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	358518000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	485761000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2606000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	26185000	usd
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-87675000	usd
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	26191000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	403018000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	577469000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	33506000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	920899000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	385358000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1552199000	usd
	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	85500000	usd
	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	238066000	usd
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	148500000	usd
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	218696000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	279075000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	991404000	usd
	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	115045000	usd
	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	701647000	usd
	colb	Change In Premises And Equipment ChangeInPremisesAndEquipment	20028000	usd
	colb	Change In Premises And Equipment ChangeInPremisesAndEquipment	-44055000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	3965000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	3020000	usd
	us-gaap	Proceeds From Sale Of Mortgage Servicing Rights Msr ProceedsFromSaleOfMortgageServicingRightsMSR	0	usd
	us-gaap	Proceeds From Sale Of Mortgage Servicing Rights Msr ProceedsFromSaleOfMortgageServicingRightsMSR	57454000	usd
	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	0	usd
	us-gaap	Payments For Proceeds From Businesses And Interest In Affiliates PaymentsForProceedsFromBusinessesAndInterestInAffiliates	-274587000	usd
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2107000	usd
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-468000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	236866000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	701757000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-92332000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-633969000	usd
	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	0	usd
	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	14000000	usd
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-68286000	usd
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-120411000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3900000000	usd
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	12100000000	usd
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	4200000000	usd
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	11301522000	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1185000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	225144000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	195351000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5634000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	6106000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-691396000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-170174000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-51512000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1109052000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2162534000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1294643000	usd
CY2024Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2111022000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2403695000	usd
	us-gaap	Interest Paid Net InterestPaidNet	790056000	usd
	us-gaap	Interest Paid Net InterestPaidNet	456797000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	66482000	usd
	us-gaap	Income Taxes Paid IncomeTaxesPaid	80226000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	103249000	usd
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-247397000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	2966000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-6292000	usd
	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	0	usd
	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	118085000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	8970189000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	106896000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	400278000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8676807000	usd
CY2024Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2159000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	636000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	usd
CY2024Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2795000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	9262777000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	55201000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	488108000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8829870000	usd
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2300000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	725000	usd
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	usd
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	3025000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	71157000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	431000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	3039561000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	399847000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	3110718000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	400278000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1292794000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	12009000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	2809244000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	476099000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	4102038000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	488108000	usd
CY2024Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	540	securities
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	600	securities
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	235915000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	236109000	usd
CY2024Q3	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	0	usd
CY2024Q3	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	0	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	2522197000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2518639000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	3000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	3000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	1869811000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1847495000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	1000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	433000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	4342266000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	4074564000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount	2155000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	2359000	usd
CY2024Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	8970189000	usd
CY2024Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	8676807000	usd
CY2024Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2159000	usd
CY2024Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2795000	usd
CY2024Q3	colb	Pledged Assets Not Separately Reported Securities Pledged For State And Local Governments PledgedAssetsNotSeparatelyReportedSecuritiesPledgedForStateAndLocalGovernments	1811227000	usd
CY2024Q3	colb	Pledged Assets Separately Reported Securities Pledged For State And Local Governments At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedForStateAndLocalGovernmentsAtFairValue	1691457000	usd
CY2024Q3	colb	Pledged Assets Not Separately Reported Repurchase Agreement PledgedAssetsNotSeparatelyReportedRepurchaseAgreement	242425000	usd
CY2024Q3	colb	Pledged Assets Separately Reported Repurchase Agreement PledgedAssetsSeparatelyReportedRepurchaseAgreement	231156000	usd
CY2024Q3	colb	Financial Instruments Other At Amortized Cost FinancialInstrumentsOtherAtAmortizedCost	3500624000	usd
CY2024Q3	us-gaap	Financial Instruments Owned Other At Fair Value FinancialInstrumentsOwnedOtherAtFairValue	3332102000	usd
CY2024Q3	colb	Financial Instruments Owned At Amortized Cost FinancialInstrumentsOwnedAtAmortizedCost	5554276000	usd
CY2024Q3	us-gaap	Financial Instruments Owned At Fair Value FinancialInstrumentsOwnedAtFairValue	5254715000	usd
CY2024Q3	colb	Loans Receivable Commercial Re Nonowneroccupiedtermnet LoansReceivableCommercialRENonowneroccupiedtermnet	6391806000	usd
CY2023Q4	colb	Loans Receivable Commercial Re Nonowneroccupiedtermnet LoansReceivableCommercialRENonowneroccupiedtermnet	6482940000	usd
CY2024Q3	colb	Loans Receivable Commercial Re Owner Occupied Term Net LoansReceivableCommercialREOwnerOccupiedTermNet	5210485000	usd
CY2023Q4	colb	Loans Receivable Commercial Re Owner Occupied Term Net LoansReceivableCommercialREOwnerOccupiedTermNet	5195605000	usd
CY2024Q3	colb	Loans Receivable Commercial Re Multifamily Net LoansReceivableCommercialREMultifamilyNet	5779737000	usd
CY2023Q4	colb	Loans Receivable Commercial Re Multifamily Net LoansReceivableCommercialREMultifamilyNet	5704734000	usd
CY2024Q3	colb	Loans Receivable Commercial Re Construction Development Net LoansReceivableCommercialREConstructionDevelopmentNet	1988923000	usd
CY2023Q4	colb	Loans Receivable Commercial Re Construction Development Net LoansReceivableCommercialREConstructionDevelopmentNet	1747302000	usd
CY2024Q3	colb	Loans Receivable Commercial Re Residential Development Net LoansReceivableCommercialREResidentialDevelopmentNet	244579000	usd
CY2023Q4	colb	Loans Receivable Commercial Re Residential Development Net LoansReceivableCommercialREResidentialDevelopmentNet	323899000	usd
CY2024Q3	colb	Loans Receivable Commercial Term LoansReceivableCommercialTerm	5429209000	usd
CY2023Q4	colb	Loans Receivable Commercial Term LoansReceivableCommercialTerm	5536765000	usd
CY2024Q3	colb	Loans Receivable Commercial Loc And Other LoansReceivableCommercialLocAndOther	2640669000	usd
CY2023Q4	colb	Loans Receivable Commercial Loc And Other LoansReceivableCommercialLocAndOther	2430127000	usd
CY2024Q3	colb	Loans Receivable Commercial Leases And Equipment Finance LoansReceivableCommercialLeasesAndEquipmentFinance	1670427000	usd
CY2023Q4	colb	Loans Receivable Commercial Leases And Equipment Finance LoansReceivableCommercialLeasesAndEquipmentFinance	1729512000	usd
CY2024Q3	colb	Loan Receivable Residential Mortgage Net LoanReceivableResidentialMortgageNet	5944734000	usd
CY2023Q4	colb	Loan Receivable Residential Mortgage Net LoanReceivableResidentialMortgageNet	6157166000	usd
CY2024Q3	colb	Loan Receivable Residential Hell Net LoanReceivableResidentialHELLNet	2017336000	usd
CY2023Q4	colb	Loan Receivable Residential Hell Net LoanReceivableResidentialHELLNet	1938166000	usd
CY2024Q3	colb	Loan Receivable Consumer Other Net LoanReceivableConsumerOtherNet	185097000	usd
CY2023Q4	colb	Loan Receivable Consumer Other Net LoanReceivableConsumerOtherNet	195735000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	37503002000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	37441951000	usd
CY2024Q3	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	65000000.0	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	71800000	usd
CY2024Q3	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	466400000	usd
CY2023Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	552500000	usd
CY2024Q3	us-gaap	Direct Financing Lease Interest Income DirectFinancingLeaseInterestIncome	5500000	usd
	us-gaap	Direct Financing Lease Interest Income DirectFinancingLeaseInterestIncome	15900000	usd
CY2023Q3	us-gaap	Direct Financing Lease Interest Income DirectFinancingLeaseInterestIncome	4700000	usd
	us-gaap	Direct Financing Lease Interest Income DirectFinancingLeaseInterestIncome	14100000	usd
CY2024Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	418671000	usd
CY2024Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	30498000	usd
CY2024Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	34976000	usd
CY2024Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	5861000	usd
CY2024Q3	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	29115000	usd
CY2024Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	420054000	usd
CY2024Q2	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	19928000	usd
CY2024Q3	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-1729000	usd
CY2024Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	18199000	usd
CY2024Q3	colb	Financing Receivable Allowance For Credit Loss And Unfunded Lending Commitments Total FinancingReceivableAllowanceForCreditLossAndUnfundedLendingCommitmentsTotal	438253000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	440871000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	82734000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	120930000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	17379000	usd
	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	103551000	usd
CY2024Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	420054000	usd
CY2023Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	23208000	usd
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-5009000	usd
CY2024Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	18199000	usd
CY2024Q3	colb	Financing Receivable Allowance For Credit Loss And Unfunded Lending Commitments Total FinancingReceivableAllowanceForCreditLossAndUnfundedLendingCommitmentsTotal	438253000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	404603000	usd
CY2023Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	35082000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	28719000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	5594000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	23125000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	416560000	usd
CY2023Q3	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	1655000	usd
CY2023Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	21482000	usd
CY2023Q3	colb	Financing Receivable Allowance For Credit Loss And Unfunded Lending Commitments Total FinancingReceivableAllowanceForCreditLossAndUnfundedLendingCommitmentsTotal	438042000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	301135000	usd
	us-gaap	Financing Receivable Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	26492000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	156796000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	82466000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	14603000	usd
	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	67863000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	416560000	usd
CY2022Q4	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	14221000	usd
	colb	Off Balance Sheet Credit Loss Liability Acquired During The Period OffBalanceSheetCreditLossLiabilityAcquiredDuringThePeriod	5767000	usd
	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	1494000	usd
CY2023Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	21482000	usd
CY2023Q3	colb	Financing Receivable Allowance For Credit Loss And Unfunded Lending Commitments Total FinancingReceivableAllowanceForCreditLossAndUnfundedLendingCommitmentsTotal	438042000	usd
	colb	Days Past Due On Leases And Equipment Finance DaysPastDueOnLeasesAndEquipmentFinance	P181D
CY2024Q3	colb	Interest Income On Non Accrual Loans And Leases InterestIncomeOnNonAccrualLoansAndLeases	0	usd
	colb	Interest Income On Non Accrual Loans And Leases InterestIncomeOnNonAccrualLoansAndLeases	0	usd
CY2023Q3	colb	Interest Income On Non Accrual Loans And Leases InterestIncomeOnNonAccrualLoansAndLeases	0	usd
	colb	Interest Income On Non Accrual Loans And Leases InterestIncomeOnNonAccrualLoansAndLeases	0	usd
CY2024Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	98796000	usd
CY2024Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	37503002000	usd
CY2023Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	74371000	usd
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	37441951000	usd
CY2024Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	14996000	usd
CY2024Q3	us-gaap	Financing Receivable Modification To Total Financing Receivables Percent FinancingReceivableModificationToTotalFinancingReceivablesPercent	0.0004
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	67015000	usd
	us-gaap	Financing Receivable Modification To Total Financing Receivables Percent FinancingReceivableModificationToTotalFinancingReceivablesPercent	0.0018
CY2023Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	19674000	usd
CY2023Q3	us-gaap	Financing Receivable Modification To Total Financing Receivables Percent FinancingReceivableModificationToTotalFinancingReceivablesPercent	0.0005
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	48559000	usd
	us-gaap	Financing Receivable Modification To Total Financing Receivables Percent FinancingReceivableModificationToTotalFinancingReceivablesPercent	0.0013
CY2024Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	5788000	usd
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	9529000	usd
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2023Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2024Q3	colb	Financing Receivable Excluding Accrued Interest Modified After12 Months Nonaccrual FinancingReceivableExcludingAccruedInterestModifiedAfter12MonthsNonaccrual	6329000	usd
CY2024Q3	us-gaap	Financing Receivable Excluding Accrued Interest Modified Past12 Months FinancingReceivableExcludingAccruedInterestModifiedPast12Months	149750000	usd
CY2023Q3	colb	Financing Receivable Excluding Accrued Interest Modified After12 Months Nonaccrual FinancingReceivableExcludingAccruedInterestModifiedAfter12MonthsNonaccrual	1782000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Modified Past12 Months FinancingReceivableExcludingAccruedInterestModifiedPast12Months	48559000	usd
CY2024Q3	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	2410981000	usd
CY2024Q3	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	3511580000	usd
CY2024Q3	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	8565469000	usd
CY2024Q3	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	7191300000	usd
CY2024Q3	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	2417828000	usd
CY2024Q3	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	7470320000	usd
CY2024Q3	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	5834151000	usd
CY2024Q3	colb	Financing Receivable Revolving To Non Revolving Loans Amortized Cost FinancingReceivableRevolvingToNonRevolvingLoansAmortizedCost	101373000	usd
CY2024Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	37503002000	usd
CY2023Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	3747171000	usd
CY2023Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	8958366000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	8055492000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	2712461000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	2838682000	usd
CY2023Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	5504993000	usd
CY2023Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	5504255000	usd
CY2023Q4	colb	Financing Receivable Revolving To Non Revolving Loans Amortized Cost FinancingReceivableRevolvingToNonRevolvingLoansAmortizedCost	120531000	usd
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	37441951000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	1000000000.0	usd
CY2024Q3	us-gaap	Goodwill Goodwill	1000000000.0	usd
CY2024Q3	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P10Y
	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	710230000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	196927000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	513303000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	764791000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	161112000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	603679000	usd
CY2024Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29100000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	90400000	usd
CY2023Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29900000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	78100000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	29055000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	105458000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	92545000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	79632000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	66719000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	139894000	usd
CY2024Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	513303000	usd
CY2024Q2	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	110039000	usd
CY2023Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	109243000	usd
CY2022Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	185017000	usd
CY2024Q3	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	1547000	usd
CY2023Q3	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	1658000	usd
	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	4324000	usd
	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	4427000	usd
CY2024Q3	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	0	usd
CY2023Q3	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	57454000	usd
	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	0	usd
	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	57454000	usd
CY2024Q3	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-3127000	usd
CY2023Q3	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-4801000	usd
	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-9463000	usd
	us-gaap	Servicing Asset At Fair Value Other Changes In Fair Value ServicingAssetAtFairValueOtherChangesInFairValue	-14479000	usd
CY2024Q3	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-6540000	usd
CY2023Q3	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	5308000	usd
	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-2185000	usd
	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	129000	usd
CY2024Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	101919000	usd
CY2023Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	117640000	usd
CY2024Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	101919000	usd
CY2023Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	117640000	usd
CY2024Q3	colb	Balance Of Loans Serviced For Others BalanceOfLoansServicedForOthers	7965538000	usd
CY2023Q4	colb	Balance Of Loans Serviced For Others BalanceOfLoansServicedForOthers	8175664000	usd
CY2024Q3	colb	Mortgage Servicing Rights Percentage Of Serviced Loans MortgageServicingRightsPercentageOfServicedLoans	0.0128
CY2023Q4	colb	Mortgage Servicing Rights Percentage Of Serviced Loans MortgageServicingRightsPercentageOfServicedLoans	0.0134
CY2024Q3	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	6000000.0	usd
	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	18000000.0	usd
CY2023Q3	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	8900000	usd
	us-gaap	Contractually Specified Servicing Fees Late Fees And Ancillary Fees Earned In Exchange For Servicing Financial Assets ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets	27500000	usd
CY2023Q3	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	57500000	usd
CY2024Q3	us-gaap	Other Borrowings OtherBorrowings	3700000000	usd
CY2023Q4	us-gaap	Other Borrowings OtherBorrowings	4000000000	usd
CY2024Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	2400000000	usd
CY2023Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	3800000000	usd
CY2023Q3	colb	Standby Letters Of Credit Financial Guaranteesrequiredtoperformon StandbyLettersOfCreditFinancialGuaranteesrequiredtoperformon	0	usd
	colb	Standby Letters Of Credit Financial Guaranteesrequiredtoperformon StandbyLettersOfCreditFinancialGuaranteesrequiredtoperformon	0	usd
	colb	Standby Letters Of Credit Financial Guaranteesrequiredtoperformon StandbyLettersOfCreditFinancialGuaranteesrequiredtoperformon	0	usd
CY2024Q3	colb	Standby Letters Of Credit Financial Guaranteesrequiredtoperformon StandbyLettersOfCreditFinancialGuaranteesrequiredtoperformon	0	usd
CY2024Q3	colb	Standby Letters Of Credit Expires Within One Year StandbyLettersOfCreditExpiresWithinOneYear	203300000	usd
CY2024Q3	colb	Standby Letters Of Credit Expire Thereafter StandbyLettersOfCreditExpireThereafter	35400000	usd
CY2024Q3	colb	Prior Bankruptcy Recoveries By Plaintiffs PriorBankruptcyRecoveriesByPlaintiffs	110000000	usd
CY2024Q3	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	2400000	usd
	colb	Counterparty Default Loss On Forward Contract CounterpartyDefaultLossOnForwardContract	0	usd
	colb	Counterparty Default Loss On Forward Contract CounterpartyDefaultLossOnForwardContract	0	usd
CY2024Q3	colb	Counterparty Default Loss On Forward Contract CounterpartyDefaultLossOnForwardContract	0	usd
CY2023Q3	colb	Counterparty Default Loss On Forward Contract CounterpartyDefaultLossOnForwardContract	0	usd
CY2024Q3	colb	Collateral Posting Clearing CollateralPostingClearing	95400000	usd
CY2023Q4	colb	Collateral Posting Clearing CollateralPostingClearing	88300000	usd
CY2024Q3	colb	Variation Margin Adjustment VariationMarginAdjustment	120600000	usd
CY2023Q4	colb	Variation Margin Adjustment VariationMarginAdjustment	166300000	usd
CY2024Q3	us-gaap	Derivative Assets DerivativeAssets	88218000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	38085000	usd
CY2024Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	209996000	usd
CY2023Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	261091000	usd
CY2024Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	460000	usd
CY2023Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	1642000	usd
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-3364000	usd
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-5979000	usd
CY2024Q3	us-gaap	Net Income Loss NetIncomeLoss	146182000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	135845000	usd
	us-gaap	Net Income Loss NetIncomeLoss	390406000	usd
	us-gaap	Net Income Loss NetIncomeLoss	255184000	usd
CY2024Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208545000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208070000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208435000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	190997000	shares
CY2024Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	909000	shares
CY2023Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	575000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	702000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	549000	shares
CY2024Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	209454000	shares
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	208645000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	209137000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	191546000	shares
CY2024Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.65
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.34
CY2024Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.65
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2024Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	18000	shares
CY2023Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	878000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	327000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	749000	shares
CY2024Q3	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	66639000	usd
CY2024Q3	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	179617000	usd
CY2024Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	101919000	usd
CY2024Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	9193196000	usd
CY2024Q3	us-gaap	Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	311896000	usd
CY2024Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	521892000	usd
CY2023Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	30715000	usd
CY2023Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	275140000	usd
CY2023Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	109243000	usd
CY2023Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	9360048000	usd
CY2023Q4	us-gaap	Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	316440000	usd
CY2023Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	577531000	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-2100000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	4000000.0	usd
CY2024Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-1500000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	3000000.0	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-19700000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodBeforeTax	-8500000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-14600000	usd
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	-6300000	usd
CY2024Q3	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	66639000	usd
CY2024Q3	colb	Fair Value Option Aggregate Unpaid Balance Loans And Long Term Receivables FairValueOptionAggregateUnpaidBalanceLoansAndLongTermReceivables	64548000	usd
CY2024Q3	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	2091000	usd
CY2023Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	30715000	usd
CY2023Q4	colb	Fair Value Option Aggregate Unpaid Balance Loans And Long Term Receivables FairValueOptionAggregateUnpaidBalanceLoansAndLongTermReceivables	29629000	usd
CY2023Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	1086000	usd
CY2024Q3	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	179617000	usd
CY2024Q3	colb	Fair Value Loans Held As Assets Aggregate Unpaid Balance Loans And Long Term Receivables FairValueLoansHeldAsAssetsAggregateUnpaidBalanceLoansAndLongTermReceivables	204378000	usd
CY2024Q3	us-gaap	Fair Value Option Loans Held As Assets Aggregate Difference FairValueOptionLoansHeldAsAssetsAggregateDifference	-24761000	usd
CY2023Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	275140000	usd
CY2023Q4	colb	Fair Value Loans Held As Assets Aggregate Unpaid Balance Loans And Long Term Receivables FairValueLoansHeldAsAssetsAggregateUnpaidBalanceLoansAndLongTermReceivables	320397000	usd
CY2023Q4	us-gaap	Fair Value Option Loans Held As Assets Aggregate Difference FairValueOptionLoansHeldAsAssetsAggregateDifference	-45257000	usd
CY2024Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	286400000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	136000000.0	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88900000	usd
	colb	Effective Tax Rate As A Percentage Of Pre Tax Income Loss EffectiveTaxRateAsAPercentageOfPreTaxIncomeLoss	0.258
CY2024Q3	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	215200000	usd
CY2023Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	210900000	usd
CY2024Q3	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	94300000	usd
CY2023Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	114100000	usd
CY2024Q3	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2024Q3	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2024Q3	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2024Q3	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false

Files In Submission

Name	View Source	Status
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0000887343-24-000262-index.html	Edgar Link	pending
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MetaLinks.json	Edgar Link	pending
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colb-20240930_def.xml	Edgar Link	unprocessable
colb-20240930_lab.xml	Edgar Link	unprocessable
colb-20240930_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
colb-20240930_htm.xml	Edgar Link	completed
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$COLB
COLUMBIA BANKING SYSTEM, INC. Stock $colb

2024 Q4 Form 10-Q Financial Statement

#000088734324000262 Filed on November 05, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$COLB COLUMBIA BANKING SYSTEM, INC. Stock $colb

2024 Q4 Form 10-Q Financial Statement

#000088734324000262 Filed on November 05, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$COLB
COLUMBIA BANKING SYSTEM, INC. Stock $colb