Credit Quality and Allowance for Credit Losses - Summary of Allowance for Credit Losses and Recorded Investment in Loans (Details) $ in Thousands	Sep. 30, 2026 USD ($) loan	Dec. 31, 2025 USD ($) loan	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	$ 31,412	$ 31,877
Individually evaluated for impairment, Allowance for loan losses	3,015	1,265
Allowance for loan losses	34,427	33,142	$ 32,827	$ 32,916
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	33,037	33,502
Individually evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	3,015	1,265
Total allowance for credit losses	36,052	34,767
Collectively evaluated for impairment, Recorded investment in loans	2,765,938	2,737,817
Individually evaluated for impairment, Recorded investment in loans	8,926	6,206
Total loans	$ 2,774,864	$ 2,744,023
PCD Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of loans \| loan	0	1
Unfunded lending commitments
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	$ 1,625	$ 1,625
Individually evaluated for impairment, Allowance for loan losses	0	0
Allowance for loan losses	1,625	1,625	1,730	2,700
One- to four-family first mortgage
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	3,929	4,651
Individually evaluated for impairment, Allowance for loan losses	112	411
Allowance for loan losses	4,041	5,062	5,219	4,430
Collectively evaluated for impairment, Recorded investment in loans	468,692	491,142
Individually evaluated for impairment, Recorded investment in loans	1,008	2,304
Total loans	469,700	493,446
Home equity loans and lines
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	1,140	1,335
Individually evaluated for impairment, Allowance for loan losses	0	0
Allowance for loan losses	1,140	1,335	986	801
Collectively evaluated for impairment, Recorded investment in loans	91,279	92,574
Individually evaluated for impairment, Recorded investment in loans	0	0
Total loans	91,279	92,574
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	13,828	14,141
Individually evaluated for impairment, Allowance for loan losses	135	362
Allowance for loan losses	13,963	14,503	14,803	13,521
Collectively evaluated for impairment, Recorded investment in loans	1,221,082	1,188,226
Individually evaluated for impairment, Recorded investment in loans	3,195	2,162
Total loans	1,224,277	1,190,388
Construction and land
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	2,906	2,813
Individually evaluated for impairment, Allowance for loan losses	0	0
Allowance for loan losses	2,906	2,813	3,090	5,484
Collectively evaluated for impairment, Recorded investment in loans	303,735	328,707
Individually evaluated for impairment, Recorded investment in loans	0	520
Total loans	303,735	329,227
Multi-family residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	1,552	1,363
Individually evaluated for impairment, Allowance for loan losses	0	136
Allowance for loan losses	1,552	1,499	1,157	1,090
Collectively evaluated for impairment, Recorded investment in loans	194,134	177,222
Individually evaluated for impairment, Recorded investment in loans	0	603
Total loans	194,134	177,825
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	7,246	6,782
Individually evaluated for impairment, Allowance for loan losses	2,768	356
Allowance for loan losses	10,014	7,138	6,824	6,861
Collectively evaluated for impairment, Recorded investment in loans	457,942	429,900
Individually evaluated for impairment, Recorded investment in loans	4,723	617
Total loans	462,665	430,517
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, including unfunded lending commitments, total allowance for credit losses	811	792
Individually evaluated for impairment, Allowance for loan losses	0	0
Allowance for loan losses	811	792	$ 748	$ 729
Collectively evaluated for impairment, Recorded investment in loans	29,074	30,046
Individually evaluated for impairment, Recorded investment in loans	0	0
Total loans	$ 29,074	$ 30,046

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