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Goodwill and other intangible assets - Components of other intangible assets subject to amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 27,096	$ 27,096
Accumulated Amortization	18,092	14,912
Net Carrying Value	9,004	12,184
Core deposits
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,810	12,810
Accumulated Amortization	11,315	10,034
Net Carrying Value	1,495	2,776
Other customer relationship
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,286	14,286
Accumulated Amortization	6,777	4,878
Net Carrying Value	$ 7,509	$ 9,408

X

- 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
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
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- Definition

Amount before 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
-Topic 928
-SubTopic 340
-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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