XML 92 R31.htm IDEA: XBRL DOCUMENT
v3.20.1

Derivatives and Balance Sheet Offsetting (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2020
Derivative [Line Items] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | The following table presents the fair value of derivatives, as well as their classification on the Consolidated Balance Sheet at March 31, 2020 and December 31, 2019:
| Asset Derivatives |  | Liability Derivatives
| March 31, 2020 |  | December 31, 2019 |  | March 31, 2020 |  | December 31, 2019
| Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value
| (in thousands)
Derivatives designated as hedging instruments:
Interest rate collar | Other assets |  | $ | 37,209 |  |  | Other assets |  | $ | 14,727 |  |  | Other liabilities |  | $ | — |  |  | Other liabilities |  | $ | — |
Derivatives not designated as hedging instruments:
Interest rate swap contracts | Other assets |  | $ | 49,775 |  |  | Other assets |  | $ | 19,144 |  |  | Other liabilities |  | $ | 49,777 |  |  | Other liabilities |  | $ | 19,145 |
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The table below presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) at March 31, 2020 and 2019:
| Amount of Gain or (Loss) Recognized in Accumulated Other Comprehensive Income on Derivative |  | Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income |  | Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
| Three Months Ended March 31, |  |  |  | Three Months Ended March 31,
| 2020 |  | 2019 |  |  |  | 2020 |  | 2019
| (in thousands)
Interest rate collar | $ | 23,423 |  |  | $ | 6,268 |  |  | Interest income |  | $ | 940 |  |  | $ | — |
Balance Sheet Offsetting [Table Text Block] | The following tables show the gross interest rate swap contracts, collar agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of cash or other financial instruments. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown.
| Gross Amounts of Recognized Assets/Liabilities |  | Gross Amounts Offset in the Consolidated Balance Sheets |  | Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets |  | Gross Amounts Not Offset in the Consolidated Balance Sheets
|  |  |  | Collateral Pledged/Received |  | Net Amount
March 31, 2020 | (in thousands)
Assets |  |  |  |  |  |  |  |  |
Interest rate swap contracts | $ | 49,775 |  |  | $ | — |  |  | $ | 49,775 |  |  | $ | — |  |  | $ | 49,775 |
Interest rate collar | $ | 37,209 |  |  | $ | — |  |  | $ | 37,209 |  |  | $ | (37,209 | ) |  | — |
Liabilities |  |  |  |  |  |  |  |  |
Interest rate swap contracts | $ | 49,777 |  |  | $ | — |  |  | $ | 49,777 |  |  | $ | (49,777 | ) |  | $ | — |
Repurchase agreements | $ | 29,252 |  |  | $ | — |  |  | $ | 29,252 |  |  | $ | (29,252 | ) |  | $ | — |
December 31, 2019 |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |
Interest rate swap contracts | $ | 19,144 |  |  | $ | — |  |  | $ | 19,144 |  |  | $ | — |  |  | $ | 19,144 |
Interest rate collar | $ | 14,727 |  |  | $ | — |  |  | $ | 14,727 |  |  | $ | (14,727 | ) |  | — |
Liabilities |  |  |  |  |  |  |  |  |
Interest rate swap contracts | $ | 19,145 |  |  | $ | — |  |  | $ | 19,145 |  |  | $ | (19,145 | ) |  | $ | — |
Repurchase agreements | $ | 64,437 |  |  | $ | — |  |  | $ | 64,437 |  |  | $ | (64,437 | ) |  | $ | — |
Carrying Value of Securities Pledged As Collateral | The following table summarizes the carrying value of securities pledged as collateral to secure public funds, borrowings and other purposes as permitted or required by law:
|  | March 31, 2020
|  | (in thousands)
To secure public funds |  | $ | 317,706 |
To secure borrowings |  | 109,060 |
Other securities pledged |  | 155,647 |
Total securities pledged as collateral |  | $ | 582,413 |
Available-for-sale Securities [Member] |
Derivative [Line Items] |
Carrying Value of Securities Pledged As Collateral | The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements:
|  | Remaining contractual maturity of the agreements
|  | Overnight and continuous |  | Up to 30 days |  | 30 - 90 days |  | Greater than 90 days |  | Total
March 31, 2020 |  | (in thousands)
Class of collateral pledged for repurchase agreements |  |  |  |  |  |  |  |  |  |
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations |  | $ | 29,252 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 29,252 |
Gross amount of recognized liabilities for repurchase agreements |  |  |  |  |  |  |  |  |  | 29,252 |
Amounts related to agreements not included in offsetting disclosure |  |  |  |  |  |  |  |  |  | $ | — |

X
- Definition [Table Text Block] for Balance Sheet Offsetting [Table] + References No definition available. + Details
Name: | colb_BalanceSheetOffsettingTableTextBlock
Namespace Prefix: | colb_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in accumulated other comprehensive income (AOCI) and reclassified into earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfCashFlowHedgesIncludedInAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of financial instruments held by the entity for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. Description may include equity, fixed income, debt or other securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729 + Details
Name: | us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |