Loans Receivable and Allowance for Credit Losses - Composition of Allowance for Loan Losses and Related Recorded Investment in Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of period	$ 24,664	$ 28,975	$ 26,154	$ 34,592	$ 34,592
Provision (benefit) charged to expense	(120)	934	(375)	613	1,237
Impact of CECL adoption				(3,090)	(3,090)
Charge-offs	(747)	(1,931)	(2,101)	(4,500)	(7,290)
Recoveries	264	195	383	558	705
Balance, end of period	24,061	28,173	24,061	28,173	26,154
Ending balance: individually evaluated for impairment	477	73	477	73	233
Ending balance: collectively evaluated for impairment	23,584	28,100	23,584	28,100	25,921
Ending balance: individually evaluated for impairment	14,091	12,044	14,091	12,044	12,726
Ending balance: collectively evaluated for impairment	2,030,998	1,710,117	2,030,998	1,710,117	1,908,846
Total	2,045,089	1,722,161	2,045,089	1,722,161	1,921,572
1-4 Family Investor Owned
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of period	4,257	4,764	4,415	3,863	3,863
Provision (benefit) charged to expense	(69)	12	(227)	147	(214)
Impact of CECL adoption				766	766
Balance, end of period	4,188	4,776	4,188	4,776	4,415
Ending balance: collectively evaluated for impairment	4,188	4,776	4,188	4,776	4,415
Ending balance: individually evaluated for impairment	436	296	436	296	793
Ending balance: collectively evaluated for impairment	336,856	351,458	336,856	351,458	342,896
Total	337,292	351,754	337,292	351,754	343,689
1-4 Family Owner-Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of period	1,963	2,051	2,012	1,723	1,723
Provision (benefit) charged to expense	(17)	101	(66)	283	143
Impact of CECL adoption				146	146
Balance, end of period	1,946	2,152	1,946	2,152	2,012
Ending balance: individually evaluated for impairment	81	73	81	73	72
Ending balance: collectively evaluated for impairment	1,865	2,079	1,865	2,079	1,940
Ending balance: individually evaluated for impairment	1,870	2,692	1,870	2,692	2,130
Ending balance: collectively evaluated for impairment	145,615	151,424	145,615	151,424	150,181
Total	147,485	154,116	147,485	154,116	152,311
Multifamily
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of period	4,214	4,514	4,365	8,021	8,021
Provision (benefit) charged to expense	(29)	224	(180)	679	306
Impact of CECL adoption				(3,962)	(3,962)
Balance, end of period	4,185	4,738	4,185	4,738	4,365
Ending balance: collectively evaluated for impairment	4,185	4,738	4,185	4,738	4,365
Ending balance: individually evaluated for impairment	5,754	1,435	5,754	1,435	2,979
Ending balance: collectively evaluated for impairment	539,569	548,598	539,569	548,598	547,580
Total	545,323	550,033	545,323	550,033	550,559
Nonresidential
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of period	2,236	3,318	3,176	2,724	2,724
Provision (benefit) charged to expense	61	(80)	(879)	(64)	(126)
Impact of CECL adoption				578	578
Balance, end of period	2,297	3,238	2,297	3,238	3,176
Ending balance: collectively evaluated for impairment	2,297	3,238	2,297	3,238	3,176
Ending balance: individually evaluated for impairment	828		828
Ending balance: collectively evaluated for impairment	336,755	317,416	336,755	317,416	342,343
Total	337,583	317,416	337,583	317,416	342,343
Construction and Land
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of period	6,403	2,522	4,807	2,683	2,683
Provision (benefit) charged to expense	393	667	1,989	1,417	3,035
Impact of CECL adoption				(911)	(911)
Balance, end of period	6,796	3,189	6,796	3,189	4,807
Ending balance: collectively evaluated for impairment	6,796	3,189	6,796	3,189	4,807
Ending balance: individually evaluated for impairment	4,807	7,621	4,807	7,621	6,659
Ending balance: collectively evaluated for impairment	637,072	308,222	637,072	308,222	497,266
Total	641,879	315,843	641,879	315,843	503,925
Business Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of period	561	357	531	120	120
Provision (benefit) charged to expense	418	93	500	94	235
Impact of CECL adoption				236	236
Charge-offs			(52)		(63)
Recoveries	8		8		3
Balance, end of period	987	450	987	450	531
Ending balance: individually evaluated for impairment	396		396		161
Ending balance: collectively evaluated for impairment	591	450	591	450	370
Ending balance: individually evaluated for impairment	396		396		165
Ending balance: collectively evaluated for impairment	29,826	21,041	29,826	21,041	19,614
Total	30,222	21,041	30,222	21,041	19,779
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of period	5,030	11,449	6,848	15,458	15,458
Provision (benefit) charged to expense	(877)	(83)	(1,512)	(1,943)	(2,142)
Impact of CECL adoption				57	57
Charge-offs	(747)	(1,931)	(2,049)	(4,500)	(7,227)
Recoveries	256	195	375	558	702
Balance, end of period	3,662	9,630	3,662	9,630	6,848
Ending balance: collectively evaluated for impairment	3,662	9,630	3,662	9,630	6,848
Ending balance: collectively evaluated for impairment	5,305	11,958	5,305	11,958	8,966
Total	$ 5,305	$ 11,958	$ 5,305	$ 11,958	$ 8,966