Loans and Allowance for Credit Losses - Loans - ACL Loans by Portfolio Segment (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	May 19, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		$ 34,187	$ 18,957	$ 18,957
Charge offs		(50)	(150)
Recoveries		6	37
Net loans (charged off) recovered		(44)	(113)
Provision for credit losses		(619)	490
Allowance for loan losses, ending balance		33,524	31,265	34,187
Brunswick Bancorp Acquisition
Financing Receivable, Allowance for Credit Loss [Roll Forward]
PCD Loans	$ 336
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			11,931	11,931
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs				(16)
Commercial real estate | CRE Nonowner Occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		10,267	8,284	8,284
Charge offs		0	0
Recoveries		0	0
Net loans (charged off) recovered		0	0
Provision for credit losses		150	(368)
Allowance for loan losses, ending balance		10,417	8,175	10,267
Commercial real estate | CRE Nonowner Occupied | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			259	259
Commercial real estate | CRE Owner Occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		5,646	2,916	2,916
Charge offs		0	(16)
Recoveries		0	0
Net loans (charged off) recovered		0	(16)
Provision for credit losses		(44)	88
Allowance for loan losses, ending balance		5,602	3,079	5,646
Commercial real estate | CRE Owner Occupied | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			91	91
Commercial real estate | Multifamily
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		2,202	1,111	1,111
Charge offs		0	0
Recoveries		0	0
Net loans (charged off) recovered		0	0
Provision for credit losses		168	13
Allowance for loan losses, ending balance		2,370	1,159	2,202
Commercial real estate | Multifamily | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			35	35
Commercial real estate | Farmland
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		2,064	831	831
Charge offs		0	0
Recoveries		0	0
Net loans (charged off) recovered		0	0
Provision for credit losses		(62)	42
Allowance for loan losses, ending balance		2,002	899	2,064
Commercial real estate | Farmland | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			26	26
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		7,131	4,593	4,593
Charge offs		0	(111)	(238)
Recoveries		0	0
Net loans (charged off) recovered		0	(111)
Provision for credit losses		(631)	186
Allowance for loan losses, ending balance		6,500	11,269	7,131
Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			6,601	6,601
Construction | Residential Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		1,256	0	0
Charge offs		0	0
Recoveries		0	0
Net loans (charged off) recovered		0	0
Provision for credit losses		(80)	153
Allowance for loan losses, ending balance		1,176	1,423	1,256
Construction | Residential Construction | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			1,270	1,270
Construction | Other Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		2,146	0	0
Charge offs		0	0
Recoveries		0	0
Net loans (charged off) recovered		0	0
Provision for credit losses		25	277
Allowance for loan losses, ending balance		2,171	2,208	2,146
Construction | Other Construction | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			1,931	1,931
Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs		(28)		(13)
Recoveries				38
Residential mortgage | 1-4 Family 1st Lien
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		1,207	370	370
Charge offs		(7)	(4)
Recoveries		0	0
Net loans (charged off) recovered		(7)	(4)
Provision for credit losses		71	(317)
Allowance for loan losses, ending balance		1,271	1,356	1,207
Residential mortgage | 1-4 Family 1st Lien | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			1,307	1,307
Residential mortgage | 1-4 Family Rental
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		1,859	288	288
Charge offs		(21)	0
Recoveries		0	30
Net loans (charged off) recovered		(21)	30
Provision for credit losses		(299)	17
Allowance for loan losses, ending balance		1,539	1,066	1,859
Residential mortgage | 1-4 Family Rental | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			731	731
Residential mortgage | HELOC and Junior Liens
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		389	661	661
Charge offs		0	0
Recoveries		0	0
Net loans (charged off) recovered		0	0
Provision for credit losses		68	21
Allowance for loan losses, ending balance		457	452	389
Residential mortgage | HELOC and Junior Liens | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			(230)	(230)
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance		20	29	29
Charge offs		(22)	(19)	(135)
Recoveries		6	7	32
Net loans (charged off) recovered		(16)	(12)
Provision for credit losses		15	8
Allowance for loan losses, ending balance		$ 19	179	20
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			154	154
Unallocated Financing Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			(126)	(126)
Charge offs			0
Recoveries			0
Net loans (charged off) recovered			0
Provision for credit losses			370
Allowance for loan losses, ending balance			0
Unallocated Financing Receivables | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, beginning balance			$ (244)	$ (244)