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Derivatives and hedging activities - Fair Values of Derivative Instruments on the Balance Sheet (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($)
Derivatives, Fair Value |  |
Interest rate floor and swaps | $ 22,196 | $ 9,870
Liability Derivatives | 21,466 | 8,818
Cash collateral | 14,530 |
Net Amounts of Assets presented in the Balance Sheet | 21,466 | 8,818
Interest expense |  |
Derivatives, Fair Value |  |
Amount of gain or (loss) reclassified as a increase to interest income |  | (48)
Interest income |  |
Derivatives, Fair Value |  |
Amount of gain or (loss) reclassified as a increase to interest income | 276 | 607
Interest Rate Floor |  |
Derivatives, Fair Value |  |
Interest rate floor and swaps | 1 | 844
Interest Rate Swaps |  |
Derivatives, Fair Value |  |
Interest rate floor and swaps | 21,794 | 9,026
Credit-risk contract |  |
Derivatives, Fair Value |  |
Cash collateral | 7,400 | 7,400
Net Amounts of Assets presented in the Balance Sheet | 2,000 | 5,600
Derivatives designated as hedging instruments |  |
Derivatives, Fair Value |  |
Interest rate floor and swaps | 1 | 844
Derivatives designated as hedging instruments | Interest Rate Floor |  |
Derivatives, Fair Value |  |
Notional amount | 25,000 |
Interest rate floor and swaps |  | 844
Derivatives designated as hedging instruments | Interest Rate Floor | Other Assets. |  |
Derivatives, Fair Value |  |
Interest rate floor and swaps | 1 |
Derivatives not designated as hedging instruments |  |
Derivatives, Fair Value |  |
Interest rate floor and swaps | 22,195 | 9,026
Liability Derivatives | $ 21,466 | 8,811
Derivatives not designated as hedging instruments | Interest Rate Swaps |  |
Derivatives, Fair Value |  |
Number of instruments held | security | 86 |
Accrued interest | $ 400 | 300
Notional amount | 382,476 | 392,700
Derivatives not designated as hedging instruments | Interest Rate Swaps | Other Assets. |  |
Derivatives, Fair Value |  |
Interest rate floor and swaps | 22,195 | 9,026
Derivatives not designated as hedging instruments | Interest Rate Swaps | Other Liabilities. |  |
Derivatives, Fair Value |  |
Liability Derivatives | 21,466 | $ 8,811
Cash Flow Hedge | Interest income |  |
Derivatives, Fair Value |  |
Amount of gain or (loss) reclassified as a increase to interest income | $ 64 |

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents accrued interest receivable as of the balance sheet date. + References No definition available. + Details
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- Definition Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226038-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=d3e41678-113959 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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