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LOANS RECEIVABLE: Loans receivable, excluding loans held for sale (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2017 | Mar. 31, 2017
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | $ 826,586 |  | $ 811,376 |  |
Less: Allowance for loan losses | 11,349 |  | 10,766 | $ 10,597 | $ 10,528
Loans receivable, net | 815,237 |  | 800,610 |  |
Commercial and construction |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 725,530 |  | 706,270 |  |
Commercial and construction | Commercial business |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 148,257 |  | 137,672 |  |
Less: Allowance for loan losses | 1,799 |  | 1,668 | 1,391 | 1,418
Commercial and construction | Commercial real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 448,019 |  | 450,597 |  |
Less: Allowance for loan losses | 5,139 |  | 4,914 | 5,176 | 5,084
Commercial and construction | Land |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 17,304 |  | 15,337 |  |
Less: Allowance for loan losses | 258 |  | 220 | 219 | 228
Commercial and construction | Multi-family |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 58,794 |  | 63,080 |  |
Less: Allowance for loan losses | 781 |  | 822 | 502 | 297
Commercial and construction | Real estate construction |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 53,156 |  | 39,584 |  |
Less: Allowance for loan losses | 855 |  | 618 | 668 | 714
Consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 101,056 |  | 105,106 |  |
Less: Allowance for loan losses | 1,788 |  | 1,809 | $ 1,932 | $ 2,099
Consumer | Real estate one-to-four family |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 88,212 |  | 90,109 |  |
Consumer | Other installment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | $ 12,844 | [1] | $ 14,997 |  |
[1] | Consists primarily of purchased automobile loans totaling $10.8 million and $12.9 million at June 30, 2018 and March 31, 2018, respectively.

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