XML 64 R54.htm IDEA: XBRL DOCUMENT
v3.23.2

Allowance for Credit Losses (Non-Accrual Loans and Leases and Loans and Leases Past Due) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | $ 37,049,299 | $ 26,155,981
Non-Accrual | 50,310 | 30,702
Allowance for credit loss on non-accrual loans | 25,900 | 17,500
GNMA Loans past due by 90 days, but not yet repurchased | 1,600 |
Greater than 30 to 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 36,186 | 26,764
60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 37,190 | 38,129
90 Days or More and Accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 31,240 | 34,556
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 104,616 | 99,449
Current and Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 36,894,373 | 26,025,830
Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 19,229,514 | 13,026,576
Commercial real estate | Commercial Real Estate, Non-owner Occupied Term [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 6,434,673 | 3,894,840
Non-Accrual | 3,689 | 2,963
Commercial real estate | Owner occupied term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 5,254,401 | 2,567,761
Non-Accrual | 7,305 | 2,048
Commercial real estate | Multifamily [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 5,622,875 | 5,285,791
Non-Accrual | 0 | 0
Commercial real estate | Construction & development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,528,924 | 1,077,346
Non-Accrual | 0 | 0
Commercial real estate | Residential development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 388,641 | 200,838
Non-Accrual | 0 | 0
Commercial real estate | Greater than 30 to 59 Days Past Due | Commercial Real Estate, Non-owner Occupied Term [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,397 | 811
Commercial real estate | Greater than 30 to 59 Days Past Due | Owner occupied term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 4,434 | 168
Commercial real estate | Greater than 30 to 59 Days Past Due | Multifamily [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | Greater than 30 to 59 Days Past Due | Construction & development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | Greater than 30 to 59 Days Past Due | Residential development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | 60 to 89 Days Past Due | Commercial Real Estate, Non-owner Occupied Term [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 4,682 | 538
Commercial real estate | 60 to 89 Days Past Due | Owner occupied term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 446 | 50
Commercial real estate | 60 to 89 Days Past Due | Multifamily [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | 60 to 89 Days Past Due | Construction & development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | 60 to 89 Days Past Due | Residential development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | 90 Days or More and Accruing | Commercial Real Estate, Non-owner Occupied Term [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 70 | 0
Commercial real estate | 90 Days or More and Accruing | Owner occupied term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 114 | 1
Commercial real estate | 90 Days or More and Accruing | Multifamily [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | 90 Days or More and Accruing | Construction & development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | 90 Days or More and Accruing | Residential development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | Total Past Due | Commercial Real Estate, Non-owner Occupied Term [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 6,149 | 1,349
Commercial real estate | Total Past Due | Owner occupied term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 4,994 | 219
Commercial real estate | Total Past Due | Multifamily [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | Total Past Due | Construction & development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | Total Past Due | Residential development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 0 | 0
Commercial real estate | Current and Other | Commercial Real Estate, Non-owner Occupied Term [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 6,424,835 | 3,890,528
Commercial real estate | Current and Other | Owner occupied term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 5,242,102 | 2,565,494
Commercial real estate | Current and Other | Multifamily [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 5,622,875 | 5,285,791
Commercial real estate | Current and Other | Construction & development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,528,924 | 1,077,346
Commercial real estate | Current and Other | Residential development, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 388,641 | 200,838
Commercial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 9,458,614 | 5,695,773
Commercial | Term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 5,449,787 | 3,029,547
Non-Accrual | 11,695 | 5,303
Commercial | Lines of credit & other, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 2,268,790 | 960,054
Non-Accrual | 1,664 | 0
Commercial | Leases & equipment finance, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,740,037 | 1,706,172
Non-Accrual | 25,957 | 20,388
Commercial | Greater than 30 to 59 Days Past Due | Term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,584 | 1,241
Commercial | Greater than 30 to 59 Days Past Due | Lines of credit & other, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 7,184 | 514
Commercial | Greater than 30 to 59 Days Past Due | Leases & equipment finance, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 15,655 | 19,929
Commercial | 60 to 89 Days Past Due | Term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 2,073 | 1,489
Commercial | 60 to 89 Days Past Due | Lines of credit & other, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 510 | 419
Commercial | 60 to 89 Days Past Due | Leases & equipment finance, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 19,316 | 23,288
Commercial | 90 Days or More and Accruing | Term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 13 | 19
Commercial | 90 Days or More and Accruing | Lines of credit & other, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 71 | 4
Commercial | 90 Days or More and Accruing | Leases & equipment finance, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 7,636 | 7,886
Commercial | Total Past Due | Term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 3,670 | 2,749
Commercial | Total Past Due | Lines of credit & other, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 7,765 | 937
Commercial | Total Past Due | Leases & equipment finance, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 42,607 | 51,103
Commercial | Current and Other | Term, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 5,434,422 | 3,021,495
Commercial | Current and Other | Lines of credit & other, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 2,259,361 | 959,117
Commercial | Current and Other | Leases & equipment finance, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,671,473 | 1,634,681
Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 8,171,856 | 7,279,000
Residential | Mortgage, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 6,272,898 | 5,647,035
Non-Accrual | 0 | 0
Residential | Home equity loans & lines, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,898,958 | 1,631,965
Non-Accrual | 0 | 0
Residential | Greater than 30 to 59 Days Past Due | Mortgage, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 847 | 847
Residential | Greater than 30 to 59 Days Past Due | Home equity loans & lines, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 4,115 | 2,808
Residential | 60 to 89 Days Past Due | Mortgage, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 8,504 | 10,619
Residential | 60 to 89 Days Past Due | Home equity loans & lines, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,414 | 1,526
Residential | 90 Days or More and Accruing | Mortgage, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 19,525 | 24,943
Residential | 90 Days or More and Accruing | Mortgage, net | GNMA Loans |  |
Financing Receivable, Past Due [Line Items] |  |
GNMA Loans past due by 90 days, but not yet repurchased | 1,600 | 6,600
Residential | 90 Days or More and Accruing | Home equity loans & lines, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 3,412 | 1,569
Residential | Total Past Due | Mortgage, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 28,876 | 36,409
Residential | Total Past Due | Home equity loans & lines, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 8,941 | 5,903
Residential | Current and Other | Mortgage, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 6,244,022 | 5,610,626
Residential | Current and Other | Home equity loans & lines, net |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,890,017 | 1,626,062
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 189,315 | 154,632
Non-Accrual | 0 | 0
Consumer Portfolio Segment [Member] | Greater than 30 to 59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 970 | 446
Consumer Portfolio Segment [Member] | 60 to 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 245 | 200
Consumer Portfolio Segment [Member] | 90 Days or More and Accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 399 | 134
Consumer Portfolio Segment [Member] | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | 1,614 | 780
Consumer Portfolio Segment [Member] | Current and Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans and Leases | $ 187,701 | $ 153,852

X
- Definition Financing Receivable, Allowance For Non-Accrual Credit Losses + References No definition available. + Details
Name: | colb_FinancingReceivableAllowanceForNonAccrualCreditLosses
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition GNMA Loans past due by 90 days, but not yet repurchased + References No definition available. + Details
Name: | colb_GNMALoansPastDueBy90DaysButNotYetRepurchased
Namespace Prefix: | colb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SEC Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) -Publisher SEC Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SEC Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) -Publisher SEC Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7A -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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

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

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

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

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

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

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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