Loans Receivable and Allowance for Credit Losses - Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	$ 24,098	$ 24,780	$ 10,310	$ 9,929	$ 9,737	$ 9,905
Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	7,302		6,043
Allowance for credit losses, collectively evaluated for impairment	16,796		4,267
Allowance for credit loss	24,098		10,310
Individually evaluated for impairment	20,305		18,916
Collectively evaluated for impairment, amount	910,429		829,400
Loans receivable, gross	930,734		848,316
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	10,039	9,809	6,966	4,980	4,889	5,063
Commercial Real Estate | Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	6,387		5,430
Allowance for credit losses, collectively evaluated for impairment	3,652		1,536
Allowance for credit loss	10,039		6,966
Individually evaluated for impairment	11,368		11,241
Collectively evaluated for impairment, amount	500,287		426,202
Loans receivable, gross	511,655		437,443
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	1,027	853	665	1,395	1,512	1,700
Residential Real Estate | Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	196		5
Allowance for credit losses, collectively evaluated for impairment	831		660
Allowance for credit loss	1,027		665
Individually evaluated for impairment	2,355		2,508
Collectively evaluated for impairment, amount	114,099		121,632
Loans receivable, gross	116,454		124,140
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	1,673	1,799	1,403	2,316	2,860	2,532
Commercial and Industrial | Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	719		608
Allowance for credit losses, collectively evaluated for impairment	954		795
Allowance for credit loss	1,673		1,403
Individually evaluated for impairment	6,582		4,653
Collectively evaluated for impairment, amount	164,992		134,134
Loans receivable, gross	171,574		138,787
Consumer and Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	11,275	12,251	1,207	1,063	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	11,275		1,207
Allowance for credit loss	11,275		1,207
Individually evaluated for impairment	0		514
Collectively evaluated for impairment, amount	123,063		140,577
Loans receivable, gross	123,063		141,091
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	33	21	24	58	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	33		24
Allowance for credit loss	33		24
Individually evaluated for impairment	0		0
Collectively evaluated for impairment, amount	5,525		4,922
Loans receivable, gross	5,525		4,922
Construction to Permanent - CRE
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	51	47	10	15	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	51		10
Allowance for credit loss	51		10
Individually evaluated for impairment	0		0
Collectively evaluated for impairment, amount	2,463		1,933
Loans receivable, gross	2,463		1,933
Unallocated
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss	0	$ 0	35	$ 102	$ 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