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Goodwill and other intangible assets - Components of other intangible assets subject to amortization (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 27,096 | $ 27,096
Accumulated Amortization | 15,707 | 14,912
Net Carrying Value | 11,389 | 12,184
Core deposits |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 12,810 | 12,810
Accumulated Amortization | 10,355 | 10,034
Net Carrying Value | 2,455 | 2,776
Other customer relationship |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 14,286 | 14,286
Accumulated Amortization | 5,352 | 4,878
Net Carrying Value | $ 8,934 | $ 9,408

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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