Loans and Allowance for Credit Losses - Allowance (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Changes in the allowance for loan losses
Beginning balance	$ 22,124	$ 23,837	$ 23,837
Provision (release of allowance) for credit losses	1,995	4,455
Initial allowance on loans purchased with credit deterioration		1,217
Charge-offs	(2,150)	(4,847)	(18,479)
Recoveries	835	3,169
Ending balance	22,804	35,513	22,124
Impact of adopting ASC 326, net of tax
Changes in the allowance for loan losses
Beginning balance		7,682	7,682
Total commercial
Changes in the allowance for loan losses
Beginning balance	12,536	15,539	15,539
Provision (release of allowance) for credit losses	2,109	1,282
Initial allowance on loans purchased with credit deterioration		710
Charge-offs	(981)	(141)
Recoveries	50	29
Ending balance	13,714	14,735	12,536
Total commercial \| Impact of adopting ASC 326, net of tax
Changes in the allowance for loan losses
Beginning balance		(2,684)	(2,684)
Total commercial \| Business
Changes in the allowance for loan losses
Beginning balance	7,931	8,771	8,771
Provision (release of allowance) for credit losses	1,297	681
Initial allowance on loans purchased with credit deterioration		710
Charge-offs	(981)	(141)	(4,572)
Recoveries	42	23
Ending balance	8,289	9,918	7,931
Total commercial \| Business \| Impact of adopting ASC 326, net of tax
Changes in the allowance for loan losses
Beginning balance		(126)	(126)
Total commercial \| Real estate
Changes in the allowance for loan losses
Beginning balance	2,931	5,704	5,704
Provision (release of allowance) for credit losses	365	313
Initial allowance on loans purchased with credit deterioration		0
Charge-offs	0	0	0
Recoveries	8	6
Ending balance	3,304	3,177	2,931
Total commercial \| Real estate \| Impact of adopting ASC 326, net of tax
Changes in the allowance for loan losses
Beginning balance		(2,846)	(2,846)
Total commercial \| Acquisition, development and construction
Changes in the allowance for loan losses
Beginning balance	1,674	1,064	1,064
Provision (release of allowance) for credit losses	447	288
Initial allowance on loans purchased with credit deterioration		0
Charge-offs	0	0	0
Recoveries	0	0
Ending balance	2,121	1,640	1,674
Total commercial \| Acquisition, development and construction \| Impact of adopting ASC 326, net of tax
Changes in the allowance for loan losses
Beginning balance		288	288
Residential real estate
Changes in the allowance for loan losses
Beginning balance	6,412	2,880	2,880
Provision (release of allowance) for credit losses	(145)	364
Initial allowance on loans purchased with credit deterioration		507
Charge-offs	0	(22)	(400)
Recoveries	35	0
Ending balance	6,302	7,618	6,412
Residential real estate \| Impact of adopting ASC 326, net of tax
Changes in the allowance for loan losses
Beginning balance		3,889	3,889
Home Equity
Changes in the allowance for loan losses
Beginning balance	97	131	131
Provision (release of allowance) for credit losses	(8)	(8)
Initial allowance on loans purchased with credit deterioration		0
Charge-offs	0	0	0
Recoveries	1	1
Ending balance	90	119	97
Home Equity \| Impact of adopting ASC 326, net of tax
Changes in the allowance for loan losses
Beginning balance		(5)	(5)
Consumer
Changes in the allowance for loan losses
Beginning balance	3,079	5,287	5,287
Provision (release of allowance) for credit losses	39	2,817
Initial allowance on loans purchased with credit deterioration		0
Charge-offs	(1,169)	(4,684)	(13,507)
Recoveries	749	3,139
Ending balance	$ 2,698	13,041	3,079
Consumer \| Impact of adopting ASC 326, net of tax
Changes in the allowance for loan losses
Beginning balance		$ 6,482	$ 6,482

Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Excluding Unfunded Commitments

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- Definition

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

+ References

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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+ References

No definition available.

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Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from purchase of loan. Excludes financing receivable purchased with credit deterioration, loan acquired through business combination or acquisition, and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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+ 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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