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LOANS RECEIVABLE, NET - Summary of loans receivable (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | $ 1,281,310 | $ 1,278,837 |
Deferred fees, costs and premiums and discounts, net | 6,299 | 5,236 |
Allowance for loan losses | (14,425) | (16,959) | $ (14,500)
Allowance for credit loss less deferred fees, costs and discounts, net | (8,126) | (11,723) |
Loans receivable, net | 1,273,184 | 1,267,114 |
Residential Portfolio Segment | Residential one-to-four family |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 560,976 | 611,603 |
Allowance for loan losses | (2,822) | (3,579) | (3,446)
Residential Portfolio Segment | Multifamily |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 515,240 | 427,436 |
Allowance for loan losses | (5,263) | (5,460) | (4,256)
Non-residential | Non-residential |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 141,561 | 128,141 |
Allowance for loan losses | (2,846) | (3,244) | (2,548)
Construction and land | Construction and land |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 23,419 | 33,691 |
Allowance for loan losses | (2,678) | (3,655) | (3,028)
Junior liens | Junior liens |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 18,464 | 23,814 |
Allowance for loan losses | (636) | (916) | (1,002)
Commercial and industrial (including PPP) |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 4,800 | 131 |
Commercial and industrial (including PPP) | Commercial and industrial (including PPP) |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 21,563 | 54,053 |
Allowance for loan losses | (51) | (2) | 0
Commercial and industrial (including PPP) | PPP Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 16,800 | 53,900 |
Consumer and other | Consumer and other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans receivable | 87 | 99 |
Allowance for loan losses | $ (38) | $ (48) | $ (56)

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