Allowance for Credit Losses - Activity in allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 40,045	$ 39,620	$ 39,767	$ 39,779	$ 39,779
Provision for credit losses	2,966	1,800	4,766	3,600
Loans charged -off	(6,091)	(3,543)	(9,283)	(7,919)
Recoveries	1,414	2,030	3,084	4,447
Ending Balance	38,334	39,907	38,334	39,907	39,767
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	13,579	12,790	13,264	12,949	12,949
Provision for credit losses	1,811	(377)	2,082	(431)
Loans charged -off	(3,548)	(209)	(3,779)	(515)
Recoveries	173	246	448	447
Ending Balance	12,015	12,450	12,015	12,450	13,264
Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14,233	15,059	14,327	14,568	14,568
Provision for credit losses	93	166	(80)	666
Loans charged -off	(42)	(63)	(56)	(142)
Recoveries	40	106	133	176
Ending Balance	14,324	15,268	14,324	15,268	14,327
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	11,919	11,513	11,797	12,104	12,104
Provision for credit losses	1,367	1,733	3,134	2,987
Loans charged -off	(2,501)	(3,271)	(5,448)	(7,262)
Recoveries	1,201	1,678	2,503	3,824
Ending Balance	11,986	11,653	11,986	11,653	11,797
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	314	258	379	158	158
Provision for credit losses	(305)	278	(370)	378
Ending Balance	$ 9	$ 536	$ 9	$ 536	$ 379

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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