Loans and Allowance for Credit Losses on Loans - Schedule of Credit Risk Ratings by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable Recorded Investment [Line Items]
2024	$ 63,781		$ 221,745
2023	237,144		582,171
2022	631,248		284,271
2021	317,501		145,890
2020	139,166		178,838
Prior	308,276		272,711
Revolving Loans	105,396		77,658
Revolving Loans Converted to Term Loans	2,475		2,561
Total	1,804,987		1,765,845
Current period charge-offs
2024	0		17
2023	0		457
2022	0		247
2021	66		0
2020	0		91
Prior	2		52
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	$ 68	$ 116	$ 864
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable		Accrued interest receivable
Accrued interest receivable	$ 7,400		$ 7,300
Pass
Financing Receivable Recorded Investment [Line Items]
2024	63,781		221,745
2023	232,477		577,233
2022	628,902		282,943
2021	314,608		144,754
2020	138,027		178,838
Prior	304,667		264,767
Revolving Loans	105,396		77,658
Revolving Loans Converted to Term Loans	2,475		2,561
Total	1,790,333		1,750,499
Special mention
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	1,415		1,428
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	1,415		1,428
Substandard
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	4,667		4,938
2022	2,346		1,328
2021	2,893		1,136
2020	1,139		0
Prior	2,194		6,418
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	13,239		13,820
Doubtful
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		98
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		98
Commercial real estate
Financing Receivable Recorded Investment [Line Items]
2024	46,808		97,114
2023	115,415		208,179
2022	265,976		154,872
2021	191,019		97,137
2020	93,290		138,908
Prior	172,014		168,316
Revolving Loans	21,012		21,059
Revolving Loans Converted to Term Loans	0		0
Total	905,534		885,585
Current period charge-offs
2024	0		0
2023	0		457
2022	0		121
2021	0		0
2020	0		91
Prior	0		17
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0	91	686
Commercial real estate | Pass
Financing Receivable Recorded Investment [Line Items]
2024	46,808		97,114
2023	110,748		207,860
2022	265,976		154,872
2021	191,019		97,137
2020	93,290		138,908
Prior	171,390		163,320
Revolving Loans	21,012		21,059
Revolving Loans Converted to Term Loans	0		0
Total	900,243		880,270
Commercial real estate | Special mention
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
Commercial real estate | Substandard
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	4,667		319
2022	0		0
2021	0		0
2020	0		0
Prior	624		4,996
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	5,291		5,315
Commercial real estate | Doubtful
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
SBA—real estate
Financing Receivable Recorded Investment [Line Items]
2024	10,510		31,920
2023	31,940		46,291
2022	46,926		27,267
2021	28,737		23,868
2020	21,916		28,244
Prior	91,474		67,105
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	231,503		224,695
Current period charge-offs
2024	0		0
2023	0		0
2022	0		46
2021	66		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	66	11	46
SBA—real estate | Pass
Financing Receivable Recorded Investment [Line Items]
2024	10,510		31,920
2023	31,940		44,504
2022	45,135		26,188
2021	25,844		22,732
2020	20,777		28,244
Prior	88,829		64,442
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	223,035		218,030
SBA—real estate | Special mention
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	1,415		1,428
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	1,415		1,428
SBA—real estate | Substandard
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		1,787
2022	1,791		1,079
2021	2,893		1,136
2020	1,139		0
Prior	1,230		1,235
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	7,053		5,237
SBA—real estate | Doubtful
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
SBA—non-real estate
Financing Receivable Recorded Investment [Line Items]
2024	2,256		5,408
2023	5,161		3,175
2022	3,056		200
2021	187		1,556
2020	1,511		950
Prior	3,876		3,708
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	16,047		14,997
Current period charge-offs
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		35
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0	14	35
SBA—non-real estate | Pass
Financing Receivable Recorded Investment [Line Items]
2024	2,256		5,408
2023	5,161		2,584
2022	2,501		200
2021	187		1,556
2020	1,511		950
Prior	3,753		3,423
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	15,369		14,121
SBA—non-real estate | Special mention
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
SBA—non-real estate | Substandard
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		591
2022	555		0
2021	0		0
2020	0		0
Prior	123		187
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	678		778
SBA—non-real estate | Doubtful
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		98
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		98
C&I
Financing Receivable Recorded Investment [Line Items]
2024	1,667		15,117
2023	15,222		17,939
2022	17,719		22,098
2021	20,588		4,695
2020	4,204		1,720
Prior	2,641		1,734
Revolving Loans	82,992		55,106
Revolving Loans Converted to Term Loans	2,475		2,561
Total	147,508		120,970
Current period charge-offs
2024	0		17
2023	0		0
2022	0		80
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0	0	97
C&I | Pass
Financing Receivable Recorded Investment [Line Items]
2024	1,667		15,117
2023	15,222		17,939
2022	17,719		22,098
2021	20,588		4,695
2020	4,204		1,720
Prior	2,641		1,734
Revolving Loans	82,992		55,106
Revolving Loans Converted to Term Loans	2,475		2,561
Total	147,508		120,970
C&I | Special mention
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
C&I | Substandard
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
C&I | Doubtful
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
Home mortgage
Financing Receivable Recorded Investment [Line Items]
2024	2,532		72,182
2023	69,406		306,587
2022	297,571		79,834
2021	76,970		18,634
2020	18,245		8,939
Prior	38,271		31,848
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	502,995		518,024
Current period charge-offs
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	2		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	2	0	0
Home mortgage | Pass
Financing Receivable Recorded Investment [Line Items]
2024	2,532		72,182
2023	69,406		304,346
2022	297,571		79,585
2021	76,970		18,634
2020	18,245		8,939
Prior	38,054		31,848
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	502,778		515,534
Home mortgage | Special mention
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
Home mortgage | Substandard
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		2,241
2022	0		249
2021	0		0
2020	0		0
Prior	217		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	217		2,490
Home mortgage | Doubtful
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
Consumer
Financing Receivable Recorded Investment [Line Items]
2024	8		4
2023	0		0
2022	0		0
2021	0		0
2020	0		77
Prior	0		0
Revolving Loans	1,392		1,493
Revolving Loans Converted to Term Loans	0		0
Total	1,400		1,574
Current period charge-offs
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0	$ 0	0
Consumer | Pass
Financing Receivable Recorded Investment [Line Items]
2024	8		4
2023	0		0
2022	0		0
2021	0		0
2020	0		77
Prior	0		0
Revolving Loans	1,392		1,493
Revolving Loans Converted to Term Loans	0		0
Total	1,400		1,574
Consumer | Special mention
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
Consumer | Substandard
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	0		0
Consumer | Doubtful
Financing Receivable Recorded Investment [Line Items]
2024	0		0
2023	0		0
2022	0		0
2021	0		0
2020	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans Converted to Term Loans	0		0
Total	$ 0		$ 0