Loans Receivable and Allowance for Credit Losses - Credit Risk Ratings by Loan Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	$ 1,921,572	$ 1,525,668
1-4 Family
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	496,000	478,846
Multifamily
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	550,559	494,667
Nonresidential
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	342,343	308,043
Construction and Land
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	503,925	185,018
Business Loans
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	19,779	39,965
Consumer
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	8,966	19,129
Pass
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	1,897,935	1,494,434
Pass | 1-4 Family
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	485,747	462,126
Pass | Multifamily
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	546,471	492,556
Pass | Nonresidential
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	339,726	307,307
Pass | Construction and Land
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	497,266	173,351
Pass | Business Loans
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	19,759	39,965
Pass | Consumer
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	8,966	19,129
Special Mention
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	5,786	9,735
Special Mention | 1-4 Family
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	2,150	7,692
Special Mention | Multifamily
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	1,109	1,437
Special Mention | Nonresidential
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	2,527	606
Substandard
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	17,851	21,499
Substandard | 1-4 Family
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	8,103	9,028
Substandard | Multifamily
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	2,979	674
Substandard | Nonresidential
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	90	130
Substandard | Construction and Land
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	6,659	$ 11,667
Substandard | Business Loans
Financing Receivable Recorded Investment [Line Items]
Loans before net deferred loan origination cost and allowance for losses on loan	$ 20