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Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit | 3 Months Ended
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Mar. 31, 2018
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit |
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit Text Block | Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit We record an allowance for loan and lease losses (the “allowance”) to recognize management’s estimate of credit losses incurred in the loan portfolio at each balance sheet date. We have used the same methodology for allowance calculations during the three months ended March 31, 2018 and 2017. The following tables show a detailed analysis of the allowance for the three months ended March 31, 2018 and 2017:
|  | Beginning Balance |  | Charge-offs |  | Recoveries |  | Provision (Recovery) |  | Ending Balance |  | Specific Reserve |  | General Allocation
Three months ended March 31, 2018 |  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 29,341 |  |  | $ | (2,414 | ) |  | $ | 553 |  |  | $ | 9,851 |  |  | $ | 37,331 |  |  | $ | 5,657 |  |  | $ | 31,674 |
Unsecured |  | 2,000 |  |  | (63 | ) |  | 249 |  |  | 409 |  |  | 2,595 |  |  | 2 |  |  | 2,593 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 701 |  |  | — |  |  | 172 |  |  | (315 | ) |  | 558 |  |  | 22 |  |  | 536 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 4,265 |  |  | — |  |  | 6 |  |  | (526 | ) |  | 3,745 |  |  | — |  |  | 3,745 |
Income property |  | 5,672 |  |  | (223 | ) |  | 141 |  |  | (888 | ) |  | 4,702 |  |  | — |  |  | 4,702 |
Owner occupied |  | 5,459 |  |  | — |  |  | 12 |  |  | (722 | ) |  | 4,749 |  |  | 5 |  |  | 4,744 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 963 |  |  | — |  |  | 16 |  |  | (67 | ) |  | 912 |  |  | — |  |  | 912 |
Residential construction |  | 3,709 |  |  | — |  |  | 3 |  |  | 924 |  |  | 4,636 |  |  | — |  |  | 4,636 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 7,053 |  |  | — |  |  | — |  |  | 421 |  |  | 7,474 |  |  | — |  |  | 7,474 |
Owner occupied |  | 4,413 |  |  | — |  |  | — |  |  | (2,490 | ) |  | 1,923 |  |  | — |  |  | 1,923 |
Consumer |  | 5,163 |  |  | (264 | ) |  | 260 |  |  | 57 |  |  | 5,216 |  |  | 171 |  |  | 5,045 |
Purchased credit impaired |  | 6,907 |  |  | (1,343 | ) |  | 1,224 |  |  | (1,123 | ) |  | 5,665 |  |  | — |  |  | 5,665 |
Unallocated |  | — |  |  | — |  |  | — |  |  | 321 |  |  | 321 |  |  | — |  |  | 321 |
Total |  | $ | 75,646 |  |  | $ | (4,307 | ) |  | $ | 2,636 |  |  | $ | 5,852 |  |  | $ | 79,827 |  |  | $ | 5,857 |  |  | $ | 73,970 |
|  | Beginning Balance |  | Charge-offs |  | Recoveries |  | Provision (Recovery) |  | Ending Balance |  | Specific Reserve |  | General Allocation
Three months ended March 31, 2017 |  | (in thousands)
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 36,050 |  |  | $ | (1,109 | ) |  | $ | 297 |  |  | $ | 434 |  |  | $ | 35,672 |  |  | $ | — |  |  | $ | 35,672 |
Unsecured |  | 960 |  |  | (18 | ) |  | 68 |  |  | 178 |  |  | 1,188 |  |  | — |  |  | 1,188 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 599 |  |  | (307 | ) |  | 117 |  |  | 236 |  |  | 645 |  |  | 11 |  |  | 634 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 1,797 |  |  | — |  |  | — |  |  | 491 |  |  | 2,288 |  |  | — |  |  | 2,288 |
Income property |  | 7,342 |  |  | — |  |  | 35 |  |  | (574 | ) |  | 6,803 |  |  | 26 |  |  | 6,777 |
Owner occupied |  | 6,439 |  |  | — |  |  | 43 |  |  | 52 |  |  | 6,534 |  |  | — |  |  | 6,534 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 316 |  |  | (14 | ) |  | 20 |  |  | 187 |  |  | 509 |  |  | — |  |  | 509 |
Residential construction |  | 669 |  |  | — |  |  | 9 |  |  | 431 |  |  | 1,109 |  |  | — |  |  | 1,109 |
Commercial & multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 404 |  |  | — |  |  | — |  |  | 378 |  |  | 782 |  |  | — |  |  | 782 |
Owner occupied |  | 1,192 |  |  | — |  |  | — |  |  | 576 |  |  | 1,768 |  |  | — |  |  | 1,768 |
Consumer |  | 3,534 |  |  | (428 | ) |  | 285 |  |  | (31 | ) |  | 3,360 |  |  | 57 |  |  | 3,303 |
Purchased credit impaired |  | 10,515 |  |  | (1,939 | ) |  | 1,144 |  |  | (325 | ) |  | 9,395 |  |  | — |  |  | 9,395 |
Unallocated |  | 226 |  |  | — |  |  | — |  |  | 742 |  |  | 968 |  |  | — |  |  | 968 |
Total |  | $ | 70,043 |  |  | $ | (3,815 | ) |  | $ | 2,018 |  |  | $ | 2,775 |  |  | $ | 71,021 |  |  | $ | 94 |  |  | $ | 70,927 |
Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows:
|  | Three Months Ended
|  | March 31,
|  | 2018 |  | 2017
|  | (in thousands)
Balance at beginning of period |  | $ | 3,130 |  |  | $ | 2,705 |
Net changes in the allowance for unfunded commitments and letters of credit |  | 1,200 |  |  | 850 |
Balance at end of period |  | $ | 4,330 |  |  | $ | 3,555 |
Risk Elements The extension of credit in the form of loans or other credit products to individuals and businesses is one of our principal business activities. Our policies and applicable laws and regulations require risk analysis as well as ongoing portfolio and credit management. We manage our credit risk through lending limit constraints, credit review, approval policies and extensive, ongoing internal monitoring. We also manage credit risk through diversification of the loan portfolio by type of loan, type of industry and type of borrower and by limiting the aggregation of debt to a single borrower. Risk ratings are reviewed and updated whenever appropriate, with more periodic reviews as the risk and dollar value of loss on the loan increases. In the event full collection of principal and interest is not reasonably assured, the loan is appropriately downgraded and, if warranted, placed on nonaccrual status even though the loan may be current as to principal and interest payments. Additionally, we assess whether an impairment of a loan warrants specific reserves or a write-down of the loan. Pass rated loans are generally considered to have sufficient sources of repayment in order to repay the loan in full in accordance with all terms and conditions. Special Mention rated loans have potential weaknesses that, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans with a risk rating of Substandard or worse are reported as classified loans in our allowance analysis. We review these loans to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating may be adjusted accordingly. Loans risk rated as Substandard reflect loans where a loss is possible if loan weaknesses are not corrected. Doubtful rated loans have a high probability of loss; however, the amount of loss has not yet been determined. Loss rated loans are considered uncollectable and when identified, are charged off. The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans, as of March 31, 2018 and December 31, 2017:
|  | Pass |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
March 31, 2018 |  | (in thousands)
Loans, excluding PCI loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 3,067,417 |  |  | $ | 47,672 |  |  | $ | 151,170 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,266,259 |
Unsecured |  | 119,416 |  |  | — |  |  | 663 |  |  | — |  |  | — |  |  | 120,079 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 177,122 |  |  | 1,208 |  |  | 2,238 |  |  | — |  |  | — |  |  | 180,568 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 279,949 |  |  | 1,288 |  |  | 8,227 |  |  | — |  |  | — |  |  | 289,464 |
Income property |  | 1,837,613 |  |  | 19,863 |  |  | 16,698 |  |  | — |  |  | — |  |  | 1,874,174 |
Owner occupied |  | 1,542,605 |  |  | 8,986 |  |  | 39,350 |  |  | — |  |  | — |  |  | 1,590,941 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 6,540 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 6,540 |
Residential construction |  | 199,868 |  |  | — |  |  | 1,210 |  |  | — |  |  | — |  |  | 201,078 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 303,079 |  |  | — |  |  | 3,058 |  |  | — |  |  | — |  |  | 306,137 |
Owner occupied |  | 67,672 |  |  | — |  |  | 5,344 |  |  | — |  |  | — |  |  | 73,016 |
Consumer |  | 314,223 |  |  | — |  |  | 7,853 |  |  | — |  |  | — |  |  | 322,076 |
Total |  | $ | 7,915,504 |  |  | $ | 79,017 |  |  | $ | 235,811 |  |  | $ | — |  |  | $ | — |  |  | 8,230,332 |
Less: |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan and lease losses |  | 74,162 |
Loans, excluding PCI loans, net |  | $ | 8,156,170 |
|  | Pass |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
December 31, 2017 |  | (in thousands)
Loans, excluding PCI loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 3,049,031 |  |  | $ | 64,600 |  |  | $ | 122,030 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,235,661 |
Unsecured |  | 123,621 |  |  | — |  |  | 554 |  |  | — |  |  | — |  |  | 124,175 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 183,312 |  |  | 1,186 |  |  | 2,056 |  |  | — |  |  | — |  |  | 186,554 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 283,673 |  |  | 5,204 |  |  | 7,104 |  |  | — |  |  | — |  |  | 295,981 |
Income property |  | 1,857,832 |  |  | 17,181 |  |  | 31,323 |  |  | — |  |  | — |  |  | 1,906,336 |
Owner occupied |  | 1,546,775 |  |  | 7,380 |  |  | 45,831 |  |  | — |  |  | — |  |  | 1,599,986 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 9,882 |  |  | — |  |  | 25 |  |  | — |  |  | — |  |  | 9,907 |
Residential construction |  | 187,863 |  |  | — |  |  | 1,828 |  |  | — |  |  | — |  |  | 189,691 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 293,028 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 293,028 |
Owner occupied |  | 68,393 |  |  | — |  |  | 4,050 |  |  | — |  |  | — |  |  | 72,443 |
Consumer |  | 323,129 |  |  | — |  |  | 9,096 |  |  | — |  |  | — |  |  | 332,225 |
Total |  | $ | 7,926,539 |  |  | $ | 95,551 |  |  | $ | 223,897 |  |  | $ | — |  |  | $ | — |  |  | 8,245,987 |
Less: |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan and lease losses |  | 68,739 |
Loans, excluding PCI loans, net |  | $ | 8,177,248 |
The following is an analysis of the credit quality of our PCI loan portfolio as of March 31, 2018 and December 31, 2017:
|  | Pass |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
March 31, 2018 |  | (in thousands)
PCI loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 12,582 |  |  | $ | — |  |  | $ | 728 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,310 |
Unsecured |  | 891 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 891 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 11,967 |  |  | — |  |  | 771 |  |  | — |  |  | — |  |  | 12,738 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 12,223 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 12,223 |
Income property |  | 22,384 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 22,384 |
Owner occupied |  | 41,874 |  |  | — |  |  | 919 |  |  | — |  |  | — |  |  | 42,793 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 164 |  |  | — |  |  | 7 |  |  | — |  |  | — |  |  | 171 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 589 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 589 |
Consumer |  | 11,514 |  |  | — |  |  | 475 |  |  | — |  |  | — |  |  | 11,989 |
Total |  | $ | 114,188 |  |  | $ | — |  |  | $ | 2,900 |  |  | $ | — |  |  | $ | — |  |  | 117,088 |
Less: |  |  |  |  |  |  |  |  |  |  |  |
Valuation discount resulting from acquisition accounting |  | 7,789 |
Allowance for loan losses |  | 5,665 |
PCI loans, net |  | $ | 103,634 |
|  | Pass |  | Special Mention |  | Substandard |  | Doubtful |  | Loss |  | Total
December 31, 2017 |  | (in thousands)
PCI loans: |  |  |  |  |  |  |  |  |  |  |  |
Commercial business: |  |  |  |  |  |  |  |  |  |  |  |
Secured |  | $ | 11,918 |  |  | $ | — |  |  | $ | 723 |  |  | $ | — |  |  | $ | — |  |  | $ | 12,641 |
Unsecured |  | 1,045 |  |  | — |  |  | 67 |  |  | — |  |  | — |  |  | 1,112 |
Real estate: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential |  | 13,817 |  |  | — |  |  | 793 |  |  | — |  |  | — |  |  | 14,610 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Commercial land |  | 9,460 |  |  | 349 |  |  | — |  |  | — |  |  | — |  |  | 9,809 |
Income property |  | 25,981 |  |  | — |  |  | 35 |  |  | — |  |  | — |  |  | 26,016 |
Owner occupied |  | 42,617 |  |  | — |  |  | 769 |  |  | — |  |  | — |  |  | 43,386 |
Real estate construction: |  |  |  |  |  |  |  |  |  |  |  |
One-to-four family residential: |  |  |  |  |  |  |  |  |  |  |  |
Land and acquisition |  | 169 |  |  | — |  |  | 8 |  |  | — |  |  | — |  |  | 177 |
Commercial and multifamily residential: |  |  |  |  |  |  |  |  |  |  |  |
Income property |  | 595 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 595 |
Consumer |  | 11,705 |  |  | — |  |  | 707 |  |  | — |  |  | — |  |  | 12,412 |
Total |  | $ | 117,307 |  |  | $ | 349 |  |  | $ | 3,102 |  |  | $ | — |  |  | $ | — |  |  | 120,758 |
Less: |  |  |  |  |  |  |  |  |  |  |  |
Valuation discount resulting from acquisition accounting |  | 8,088 |
Allowance for loan losses |  | 6,907 |
PCI loans, net |  | $ | 105,763 |

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- Definition Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit [Abstract] + References No definition available. + Details
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Namespace Prefix: | colb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit [Text Block] + References No definition available. + Details
Name: | colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock
Namespace Prefix: | colb_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration