Loans Receivable - Modified Loans (Details) $ in Thousands	Jun. 30, 2025 USD ($)
Financing Receivable Modifications [Line Items]
Total Past Due	$ 11,146
Non-Accrual	14,728
Current
Financing Receivable Modifications [Line Items]
Total Past Due	22,784
30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Total Past Due	2,582
90 Days and Over
Financing Receivable Modifications [Line Items]
Total Past Due	8,564
Multi-family mortgage
Financing Receivable Modifications [Line Items]
Total Past Due	11,146
Non-Accrual	14,515
Multi-family mortgage \| Current
Financing Receivable Modifications [Line Items]
Total Past Due	22,571
Multi-family mortgage \| 30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Total Past Due	2,582
Multi-family mortgage \| 90 Days and Over
Financing Receivable Modifications [Line Items]
Total Past Due	8,564
Nonresidential mortgage
Financing Receivable Modifications [Line Items]
Total Past Due	0
Non-Accrual	169
Nonresidential mortgage \| Current
Financing Receivable Modifications [Line Items]
Total Past Due	169
Nonresidential mortgage \| 30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Total Past Due	0
Nonresidential mortgage \| 90 Days and Over
Financing Receivable Modifications [Line Items]
Total Past Due	0
Commercial pass-through securities
Financing Receivable Modifications [Line Items]
Total Past Due	0
Non-Accrual	44
Commercial pass-through securities \| Current
Financing Receivable Modifications [Line Items]
Total Past Due	44
Commercial pass-through securities \| 30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Total Past Due	0
Commercial pass-through securities \| 90 Days and Over
Financing Receivable Modifications [Line Items]
Total Past Due	$ 0