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LOANS RECEIVABLE - Summary of Aging Analysis of Modifications (Details) $ in Thousands	Sep. 30, 2025 USD ($)
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	$ 3,378
Current
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	22,509
30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	0
90 Days and Over
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	0
Total Past Due
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	0
Multifamily
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	3,335
Multifamily | Current
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	22,466
Multifamily | 30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	0
Multifamily | 90 Days and Over
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	0
Multifamily | Total Past Due
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	0
Commercial
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	43
Commercial | Current
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	43
Commercial | 30-89 Days Past Due
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	0
Commercial | 90 Days and Over
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	0
Commercial | Total Past Due
Financing Receivable Modifications [Line Items]
Financing receivable, modified in period	$ 0

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