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ALLOWANCE FOR LOAN LOSSES: Financing Receivables, Aging of Loans (Details 2) - USD ($) $ in Thousands | Dec. 31, 2018 | Mar. 31, 2018
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual | $ 1,608 | $ 2,418
Total Past Due and Non-accrual | 2,083 | 2,938
Current | 866,553 | 808,438
Total Loans Receivable | 868,636 | 811,376
30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 471 | 520
90 Days and Greater Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 4 | 0
Commercial and construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans Receivable | 772,675 | 706,270
Commercial and construction | Commercial business |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual | 268 | 178
Total Past Due and Non-accrual | 268 | 185
Current | 154,092 | 137,487
Total Loans Receivable | 154,360 | 137,672
Commercial and construction | Commercial business | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 7
Commercial and construction | Commercial business | 90 Days and Greater Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 0
Commercial and construction | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual | 1,112 | 1,200
Total Past Due and Non-accrual | 1,121 | 1,200
Current | 467,240 | 449,397
Total Loans Receivable | 468,361 | 450,597
Commercial and construction | Commercial real estate | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 9 | 0
Commercial and construction | Commercial real estate | 90 Days and Greater Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 0
Commercial and construction | Land |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual | 0 | 763
Total Past Due and Non-accrual | 0 | 763
Current | 18,506 | 14,574
Total Loans Receivable | 18,506 | 15,337
Commercial and construction | Land | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 0
Commercial and construction | Land | 90 Days and Greater Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 0
Commercial and construction | Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual | 0 | 0
Total Past Due and Non-accrual | 0 | 0
Current | 54,930 | 63,080
Total Loans Receivable | 54,930 | 63,080
Commercial and construction | Multi-family | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 0
Commercial and construction | Multi-family | 90 Days and Greater Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 0
Commercial and construction | Real estate construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual | 0 | 0
Total Past Due and Non-accrual | 0 | 0
Current | 76,518 | 39,584
Total Loans Receivable | 76,518 | 39,584
Commercial and construction | Real estate construction | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 0
Commercial and construction | Real estate construction | 90 Days and Greater Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 0 | 0
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual | 228 | 277
Total Past Due and Non-accrual | 694 | 790
Current | 95,267 | 104,316
Total Loans Receivable | 95,961 | 105,106
Consumer | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | 462 | 513
Consumer | 90 Days and Greater Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past Due | $ 4 | $ 0

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