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LOANS RECEIVABLE, NET - Summary of past due loans in non-accrual and past 90 days still on accrual (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | $ 11,983 | $ 12,856
Loans Past Due 90 Days and Still Accruing | 116 | 0
Residential Portfolio Segment | Residential one-to-four family |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 10,805 | 11,813
Loans Past Due 90 Days and Still Accruing | 0 | 0
Residential Portfolio Segment | Multifamily |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 139 | 156
Loans Past Due 90 Days and Still Accruing | 0 | 0
Non-residential | Non-residential |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 857 | 805
Loans Past Due 90 Days and Still Accruing | 0 | 0
Construction and land | Construction and land |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 0 | 0
Loans Past Due 90 Days and Still Accruing | 0 | 0
Commercial and industrial (including PPP) | Commercial and industrial (including PPP) |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 0 | 0
Loans Past Due 90 Days and Still Accruing | 116 | 0
Junior liens | Junior liens |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual | 182 | 82
Loans Past Due 90 Days and Still Accruing | $ 0 | $ 0

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