Fair value measurement - Changes in level 3 assets and liabilities measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Assets, Fair Value Disclosure [Abstract]
Beginning Balance	$ 130,596	$ 122,874
Gains (Losses) included in earnings	(1,385)	1,003
Gains (losses) included in OCI	(6)	(8)
Additions	501	2,773
Settlements	(101)	(50)
Ending Balance	129,605	126,592
Changes in unrealized gains (losses) included in earnings relating to assets still held	1,295	4,256
Liabilities, Fair Value Disclosure [Abstract]
Beginning Balance		9,241
Gains (Losses) included in earnings		0
Gains (losses) included in OCI		0
Additions		0
Settlements		0
Ending Balance		9,241
Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss		0
Contingent consideration
Liabilities, Fair Value Disclosure [Abstract]
Beginning Balance		9,241
Gains (Losses) included in earnings		0
Gains (losses) included in OCI		0
Additions		0
Settlements		0
Ending Balance		9,241
Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss		0
Debt securities available-for-sale \| Mortgage Backed Securities
Assets, Fair Value Disclosure [Abstract]
Beginning Balance	711	826
Gains (Losses) included in earnings	0	0
Gains (losses) included in OCI	(6)	(8)
Additions	0	0
Settlements	(50)	(25)
Ending Balance	655	793
Changes in unrealized gains (losses) included in earnings relating to assets still held	0	0
Debt securities available-for-sale \| Other
Assets, Fair Value Disclosure [Abstract]
Beginning Balance	1,000
Gains (Losses) included in earnings	0
Gains (losses) included in OCI	0
Additions	0
Settlements	0
Ending Balance	1,000
Changes in unrealized gains (losses) included in earnings relating to assets still held	0
Trading account debt securities \| Mortgage Backed Securities
Assets, Fair Value Disclosure [Abstract]
Beginning Balance	215
Gains (Losses) included in earnings	(1)
Gains (losses) included in OCI	0
Additions	0
Settlements	(26)
Ending Balance	188
Changes in unrealized gains (losses) included in earnings relating to assets still held	0
Trading account debt securities \| CMO
Assets, Fair Value Disclosure [Abstract]
Beginning Balance	113	198
Gains (Losses) included in earnings	0	(1)
Gains (losses) included in OCI	0	0
Additions	0	2
Settlements	(25)	(25)
Ending Balance	88	174
Changes in unrealized gains (losses) included in earnings relating to assets still held	0	(1)
Trading account debt securities \| Other
Assets, Fair Value Disclosure [Abstract]
Beginning Balance	207	280
Gains (Losses) included in earnings	(8)	(13)
Gains (losses) included in OCI	0	0
Additions	0	0
Settlements	0	0
Ending Balance	199	267
Changes in unrealized gains (losses) included in earnings relating to assets still held	9	5
Mortgage Servicing Rights
Assets, Fair Value Disclosure [Abstract]
Beginning Balance	128,350	121,570
Gains (Losses) included in earnings	(1,376)	1,017
Gains (losses) included in OCI	0	0
Additions	501	2,771
Settlements	0	0
Ending Balance	127,475	125,358
Changes in unrealized gains (losses) included in earnings relating to assets still held	$ 1,286	$ 4,252

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Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
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Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held.

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in other comprehensive income (OCI) from liability measured at fair value on recurring basis using unobservable input (level 3).

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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