Loans and Allowance for Credit Losses on Loans - Schedule of Allowance for Loan Losses by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable Impaired [Line Items]
Balance Beginning	$ 14,493	$ 11,218	$ 11,218
Cumulative effect adjustment for adoption of ASC 326	0	2,077	2,077
Credit losses charged to the allowance	(705)	(75)	(741)
Recoveries	185	21	298
Provision for credit losses	475	709	1,641
Ending Balance	14,448	13,950	14,493
Ending balance: Individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	14,448		14,493
Ending balance	1,431,491		1,455,159
Ending balance individually evaluated for impairment	4,113		5,574
Ending balance collectively evaluated for impairment	1,427,378		1,449,585
Construction And Farmland
Financing Receivable Impaired [Line Items]
Balance Beginning	772	2,714	2,714
Cumulative effect adjustment for adoption of ASC 326			(1,840)
Credit losses charged to the allowance	(94)		0
Recoveries	2		8
Provision for credit losses	197		(110)
Ending Balance	877		772
Ending balance: Individually evaluated for impairment			0
Ending balance: collectively evaluated for impairment	877		772
Ending balance	82,692		84,145
Ending balance individually evaluated for impairment	0		95
Ending balance collectively evaluated for impairment	82,692		84,050
Residential Real Estate
Financing Receivable Impaired [Line Items]
Balance Beginning	4,725	1,735	1,735
Cumulative effect adjustment for adoption of ASC 326			1,933
Credit losses charged to the allowance	(15)		0
Recoveries	6		18
Provision for credit losses	(95)		1,039
Ending Balance	4,621		4,725
Ending balance: Individually evaluated for impairment			0
Ending balance: collectively evaluated for impairment	4,621		4,725
Ending balance	354,155		356,116
Ending balance individually evaluated for impairment	1,263		1,288
Ending balance collectively evaluated for impairment	352,892		354,828
Commercial Real Estate & MultiFamily
Financing Receivable Impaired [Line Items]
Balance Beginning	6,224	2,221	2,221
Cumulative effect adjustment for adoption of ASC 326			3,584
Credit losses charged to the allowance			0
Recoveries	155		0
Provision for credit losses	(473)		419
Ending Balance	5,906		6,224
Ending balance: Individually evaluated for impairment			0
Ending balance: collectively evaluated for impairment	5,906		6,224
Ending balance	598,936		600,335
Ending balance individually evaluated for impairment	2,336		3,639
Ending balance collectively evaluated for impairment	596,600		596,696
Commercial
Financing Receivable Impaired [Line Items]
Balance Beginning	1,027	2,222	2,222
Cumulative effect adjustment for adoption of ASC 326			(1,102)
Credit losses charged to the allowance	(74)		(312)
Recoveries	14		43
Provision for credit losses	24		176
Ending Balance	991		1,027
Ending balance: Individually evaluated for impairment			0
Ending balance: collectively evaluated for impairment	991		1,027
Ending balance	100,112		107,828
Ending balance individually evaluated for impairment	0		0
Ending balance collectively evaluated for impairment	100,112		107,828
Marine
Financing Receivable Impaired [Line Items]
Balance Beginning	1,153	1,555	1,555
Cumulative effect adjustment for adoption of ASC 326			(285)
Credit losses charged to the allowance	(453)		(126)
Recoveries			0
Provision for credit losses	841		9
Ending Balance	1,541		1,153
Ending balance: Individually evaluated for impairment			0
Ending balance: collectively evaluated for impairment	1,541		1,153
Ending balance	247,042		251,168
Ending balance individually evaluated for impairment	514		552
Ending balance collectively evaluated for impairment	246,528		250,616
Consumer
Financing Receivable Impaired [Line Items]
Balance Beginning	198	299	299
Cumulative effect adjustment for adoption of ASC 326			(123)
Credit losses charged to the allowance	(38)		(121)
Recoveries	5		48
Provision for credit losses	(32)		95
Ending Balance	133		198
Ending balance: Individually evaluated for impairment			0
Ending balance: collectively evaluated for impairment	133		198
Ending balance	34,529		42,419
Ending balance individually evaluated for impairment			0
Ending balance collectively evaluated for impairment	34,529		42,419
All Other Loans
Financing Receivable Impaired [Line Items]
Balance Beginning	394	$ 472	472
Cumulative effect adjustment for adoption of ASC 326			(90)
Credit losses charged to the allowance	(31)		(182)
Recoveries	3		181
Provision for credit losses	(85)		13
Ending Balance	281		394
Ending balance: Individually evaluated for impairment			0
Ending balance: collectively evaluated for impairment	281		394
Ending balance	14,025		13,148
Ending balance individually evaluated for impairment			0
Ending balance collectively evaluated for impairment	14,025		$ 13,148
Unallocated
Financing Receivable Impaired [Line Items]
Provision for credit losses	98
Ending Balance	98
Ending balance: collectively evaluated for impairment	$ 98