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Loans Receivable and Allowance for Credit Losses - Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	$ 17,801	$ 10,310	$ 9,737	$ 9,905
Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	7,135	6,043
Allowance for credit losses, collectively evaluated for impairment	10,666	4,267
Allowance for credit loss	17,801	10,310
Individually evaluated for impairment	24,247	18,916
Collectively evaluated for impairment, amount	854,522	829,400
Loans receivable, gross	878,769	848,316
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	9,809	6,966	4,889	5,063
Commercial Real Estate \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	6,352	5,430
Allowance for credit losses, collectively evaluated for impairment	3,457	1,536
Allowance for credit loss	9,809	6,966
Individually evaluated for impairment	11,368	11,241
Collectively evaluated for impairment, amount	453,042	426,202
Loans receivable, gross	464,410	437,443
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	853	665	1,512	1,700
Residential Real Estate \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	29	5
Allowance for credit losses, collectively evaluated for impairment	824	660
Allowance for credit loss	853	665
Individually evaluated for impairment	2,491	2,508
Collectively evaluated for impairment, amount	116,401	121,632
Loans receivable, gross	118,892	124,140
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	1,799	1,403	2,860	2,532
Commercial and Industrial \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	754	608
Allowance for credit losses, collectively evaluated for impairment	1,045	795
Allowance for credit loss	1,799	1,403
Individually evaluated for impairment	7,559	4,653
Collectively evaluated for impairment, amount	146,214	134,134
Loans receivable, gross	153,773	138,787
Consumer and Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	5,272	1,207	319	253
Consumer and Other \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Allowance for credit losses, collectively evaluated for impairment	5,272	1,207
Allowance for credit loss	5,272	1,207
Individually evaluated for impairment	512	514
Collectively evaluated for impairment, amount	131,898	140,577
Loans receivable, gross	132,410	141,091
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	21	24	56	78
Construction \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Allowance for credit losses, collectively evaluated for impairment	21	24
Allowance for credit loss	21	24
Individually evaluated for impairment	2,317	0
Collectively evaluated for impairment, amount	4,735	4,922
Loans receivable, gross	7,052	4,922
Construction to Permanent - CRE
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	47	10	9	41
Construction to Permanent - CRE \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Allowance for credit losses, collectively evaluated for impairment	47	10
Allowance for credit loss	47	10
Individually evaluated for impairment	0	0
Collectively evaluated for impairment, amount	2,232	1,933
Loans receivable, gross	2,232	1,933
Unallocated
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	0	35	$ 92	$ 238
Unallocated \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Allowance for credit losses, collectively evaluated for impairment	0	35
Allowance for credit loss	0	35
Individually evaluated for impairment	0	0
Collectively evaluated for impairment, amount	0	0
Loans receivable, gross	$ 0	$ 0