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Loans Receivable and Allowance for Credit Losses - Schedule of Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	$ 8,469	$ 7,779	$ 6,839	$ 7,795	$ 6,729	$ 7,305
Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, Individually evaluated loans	2,715		2,101
Allowance for credit losses, Collectively evaluated loans	5,754		4,738
Total allowance for credit losses	8,469		6,839
Loans receivable, gross, Individually evaluated loans	25,811		12,495
Loans receivable, gross, Collectively evaluated loans	860,098		580,067
Loans receivable, gross	885,909		592,562
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	2,881	2,602	2,340	2,436	2,275	2,241
Commercial Real Estate \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, Individually evaluated loans	594		0
Allowance for credit losses, Collectively evaluated loans	2,287		2,340
Total allowance for credit losses	2,881		2,340
Loans receivable, gross, Individually evaluated loans	13,084		7,240
Loans receivable, gross, Collectively evaluated loans	474,181		338,951
Loans receivable, gross	487,265		346,191
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	1,241	1,356	753	519	639	596
Residential Real Estate \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, Individually evaluated loans	0		0
Allowance for credit losses, Collectively evaluated loans	1,241		753
Total allowance for credit losses	1,241		753
Loans receivable, gross, Individually evaluated loans	575		57
Loans receivable, gross, Collectively evaluated loans	200,579		79,612
Loans receivable, gross	201,153		79,669
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	4,115	3,532	3,305	1,785	1,168	1,077
Commercial and Industrial \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, Individually evaluated loans	2,120		2,100
Allowance for credit losses, Collectively evaluated loans	1,995		1,204
Total allowance for credit losses	4,115		3,305
Loans receivable, gross, Individually evaluated loans	12,007		5,197
Loans receivable, gross, Collectively evaluated loans	177,087		141,628
Loans receivable, gross	189,094		146,825
Consumer and Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	233	289	441	3,050	2,607	3,386
Consumer and Other \| Business Activities Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit losses, Individually evaluated loans	1		1
Allowance for credit losses, Collectively evaluated loans	231		440
Total allowance for credit losses	232		441
Loans receivable, gross, Individually evaluated loans	145		1
Loans receivable, gross, Collectively evaluated loans	8,251		19,876
Loans receivable, gross	8,396		19,877
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Total allowance for credit losses	$ 0	$ 0	$ 0	$ 5	$ 8	$ 5