XML 58 R49.htm IDEA: XBRL DOCUMENT
v3.22.1

Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | $ 17,441 | $ 23,041
Total Loans | 10,759,684 | 10,641,937
Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 939 | 1,872
Total Loans | 5,047,472 | 4,981,263
Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 10,201 | 13,321
Total Loans | 3,492,307 | 3,423,268
Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 5,053 | 5,396
Total Loans | 765,319 | 795,715
Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 0 | 0
Total Loans | 409,242 | 384,755
One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 1,236 | 2,433
Total Loans | 1,003,157 | 1,013,908
Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 12 | 19
Total Loans | 42,187 | 43,028
Financial Asset, Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 10,732,673 | 10,611,528
Financial Asset, Not Past Due | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 5,045,647 | 4,977,781
Financial Asset, Not Past Due | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,478,768 | 3,406,539
Financial Asset, Not Past Due | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 755,439 | 789,112
Financial Asset, Not Past Due | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 409,242 | 384,755
Financial Asset, Not Past Due | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,001,426 | 1,010,343
Financial Asset, Not Past Due | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 42,151 | 42,998
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 8,750 | 4,860
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 886 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,013 | 2,721
Financial Asset, 30 to 59 Days Past Due [Member] | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 4,332 | 1,207
Financial Asset, 30 to 59 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 495 | 921
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 24 | 11
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 820 | 2,508
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 1,610
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 325 | 687
Financial Asset, 60 to 89 Days Past Due [Member] | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 495 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 211
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 9,570 | 7,368
Financial Asset, Past Due | Commercial Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 886 | 1,610
Financial Asset, Past Due | Commercial Business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,338 | 3,408
Financial Asset, Past Due | Agriculture [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 4,827 | 1,207
Financial Asset, Past Due | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Financial Asset, Past Due | One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 495 | 1,132
Financial Asset, Past Due | Consumer Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | $ 24 | $ 11

X
- Definition Amount of financing receivable on nonaccrual status. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) + 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 No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
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_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: |