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LOANS RECEIVABLE: Loans receivable, excluding loans held for sale (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | $ 811,376 | $ 779,432 |  |
Less: Allowance for loan losses |  | 10,766 | 10,528 | $ 9,885 | $ 10,762
Loans receivable, net |  | 800,610 | 768,904 |  |
Commercial and construction |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | 706,270 | 660,189 |  |
Commercial and construction | Commercial business |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | 137,672 | 107,371 |  |
Less: Allowance for loan losses |  | 1,668 | 1,418 | 1,048 | 1,263
Commercial and construction | Commercial real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | 450,597 | 447,071 |  |
Less: Allowance for loan losses |  | 4,914 | 5,084 | 4,273 | 4,268
Commercial and construction | Land |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | 15,337 | 15,875 |  |
Less: Allowance for loan losses |  | 220 | 228 | 325 | 539
Commercial and construction | Multi-family |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | 63,080 | 43,715 |  |
Less: Allowance for loan losses |  | 822 | 297 | 712 | 348
Commercial and construction | Real estate construction |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | 39,584 | 46,157 |  |
Less: Allowance for loan losses |  | 618 | 714 | 416 | 769
Consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | 105,106 | 119,243 |  |
Less: Allowance for loan losses |  | 1,809 | 2,099 | $ 2,403 | $ 2,548
Consumer | Real estate one-to-four family |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans |  | 90,109 | 92,865 |  |
Consumer | Other installment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | [1] | $ 14,997 | $ 26,378 |  |
[1] | Consists primarily of purchased automobile loans totaling $12.9 million and $23.6 million at March 31, 2018 and 2017, respectively.

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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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