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Loans Receivable and Allowance for Credit Losses - Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	$ 14,989	$ 13,777	$ 15,925	$ 24,098	$ 24,780	$ 10,310
Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	5,717		4,205
Collectively evaluated loans	9,272		11,720
Total allowance for credit losses	14,989		15,925
Individually evaluated loans	35,890		17,133
Collectively evaluated loans	740,412		831,726
Loans receivable, gross	776,302		848,859
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	7,958	5,620	6,089	10,039	9,809	6,966
Commercial Real Estate \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	5,717		3,813
Collectively evaluated loans	2,241		2,276
Total allowance for credit losses	7,958		6,089
Individually evaluated loans	27,675		12,775
Collectively evaluated loans	430,881		459,318
Loans receivable, gross	458,556		472,093
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	678	671	607	1,027	853	665
Residential Real Estate \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	0		0
Collectively evaluated loans	678		607
Total allowance for credit losses	678		607
Individually evaluated loans	172		0
Collectively evaluated loans	99,247		106,783
Loans receivable, gross	99,419		106,783
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	1,215	1,199	1,269	1,673	1,799	1,403
Commercial and Industrial \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	0		392
Collectively evaluated loans	1,215		877
Total allowance for credit losses	1,215		1,269
Individually evaluated loans	5,686		3,904
Collectively evaluated loans	129,058		159,661
Loans receivable, gross	134,744		163,565
Consumer and Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	5,133	6,280	7,843	11,275	12,251	1,207
Consumer and Other \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	0		0
Collectively evaluated loans	5,133		7,843
Total allowance for credit losses	5,133		7,843
Individually evaluated loans	0		0
Collectively evaluated loans	77,397		99,688
Loans receivable, gross	77,397		99,688
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	5	7	4	33	21	24
Construction \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	0		0
Collectively evaluated loans	5		4
Total allowance for credit losses	5		4
Individually evaluated loans	0		454
Collectively evaluated loans	3,829		3,812
Loans receivable, gross	3,829		4,266
Construction to Permanent - CRE
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	0	0	113	51	47	10
Construction to Permanent - CRE \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	0		0
Collectively evaluated loans	0		113
Total allowance for credit losses	0		113
Individually evaluated loans	2,357		0
Collectively evaluated loans	0		2,464
Loans receivable, gross	2,357		2,464
Unallocated
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	$ 0	$ 0	$ 0	$ 0	$ 0	$ 35