Loans Receivable and Allowance for Credit Losses - Amortized Basis (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	$ 28,501	$ 6,529
% of Total Class of Loans and Leases	0.15%	0.06%
Mortgage Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	$ 7,221	$ 1,508
% of Total Class of Loans and Leases	0.05%	0.02%
Mortgage Portfolio Segment \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	$ 5,924
% of Total Class of Loans and Leases	0.08%
Mortgage Portfolio Segment \| Multi-family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	$ 1,297	$ 1,508
% of Total Class of Loans and Leases	0.04%	0.08%
Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	$ 21,280	$ 5,021
% of Total Class of Loans and Leases	0.46%	0.21%
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	$ 0	$ 3,771
Term Extension \| Mortgage Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	0	0
Term Extension \| Mortgage Portfolio Segment \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	0
Term Extension \| Mortgage Portfolio Segment \| Multi-family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	0	0
Term Extension \| Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	0	3,771
Interest Rate Change
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	14,111	0
Interest Rate Change \| Mortgage Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	1,297	0
Interest Rate Change \| Mortgage Portfolio Segment \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	0
Interest Rate Change \| Mortgage Portfolio Segment \| Multi-family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	1,297	0
Interest Rate Change \| Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	12,814	0
Interest Rate Change and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	11,538	2,758
Interest Rate Change and Term Extension \| Mortgage Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	3,072	1,508
Interest Rate Change and Term Extension \| Mortgage Portfolio Segment \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	3,072
Interest Rate Change and Term Extension \| Mortgage Portfolio Segment \| Multi-family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	0	1,508
Interest Rate Change and Term Extension \| Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	8,466	$ 1,250
Change in Payment Type
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	2,852
Change in Payment Type \| Mortgage Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	2,852
Change in Payment Type \| Mortgage Portfolio Segment \| Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	2,852
Change in Payment Type \| Mortgage Portfolio Segment \| Multi-family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	0
Change in Payment Type \| Commercial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Modified period amount	$ 0

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

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- Definition

Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

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- Definition

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+ References

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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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