XML 76 R47.htm IDEA: XBRL DOCUMENT
v3.23.1

Loans and Leases (Schedule Of Major Types Of Loans And Leases) (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Receivables [Abstract] |  |
Non-owner occupied term, net | $ 6,353,550 | $ 3,894,840
Owner occupied term, net | 5,156,848 | 2,567,761
Multifamily, net | 5,590,587 | 5,285,791
Construction & development, net | 1,467,561 | 1,077,346
Residential development, net | 440,667 | 200,838
Term, net | 5,906,774 | 3,029,547
Lines of credit & other, net | 2,184,762 | 960,054
Leases & equipment finance, net | 1,746,267 | 1,706,172
Mortgage, net | 6,187,964 | 5,647,035
Home equity loans & lines, net | 1,870,002 | 1,631,965
Consumer & other, net | 186,298 | 154,632
Total loans and leases, net of deferred fees and costs | $ 37,091,280 | $ 26,155,981

X
- Definition Loan Receivable, Consumer & Other,Net + References No definition available. + Details
Name: | colb_LoanReceivableConsumerOtherNet
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loan Receivable, Residential, HEL&L,Net + References No definition available. + Details
Name: | colb_LoanReceivableResidentialHELLNet
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loan Receivable, Residential, Mortgage,Net + References No definition available. + Details
Name: | colb_LoanReceivableResidentialMortgageNet
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Receivable Commercial Leases And Equipment Finance + References No definition available. + Details
Name: | colb_LoansReceivableCommercialLeasesAndEquipmentFinance
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Receivable Commercial LOC and Other + References No definition available. + Details
Name: | colb_LoansReceivableCommercialLocAndOther
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Receivable, Commercial RE, Construction & Development, Net + References No definition available. + Details
Name: | colb_LoansReceivableCommercialREConstructionDevelopmentNet
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Receivable, Commercial RE, Multifamily, Net + References No definition available. + Details
Name: | colb_LoansReceivableCommercialREMultifamilyNet
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Receivable, Commercial RE, Non-owner occupied term, net + References No definition available. + Details
Name: | colb_LoansReceivableCommercialRENonowneroccupiedtermnet
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Receivable, Commercial RE, Owner Occupied Term, Net + References No definition available. + Details
Name: | colb_LoansReceivableCommercialREOwnerOccupiedTermNet
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Receivable, Commercial RE, Residential Development, Net + References No definition available. + Details
Name: | colb_LoansReceivableCommercialREResidentialDevelopmentNet
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans Receivable Commercial Term + References No definition available. + Details
Name: | colb_LoansReceivableCommercialTerm
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration