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ALLOWANCE FOR LOAN LOSSES: Schedule of Impaired Loans, Average Recorded Investment and Interest Recognized (Details 6) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Average Recorded Investment | $ 13,118 | $ 18,262 | $ 24,391
Interest Recognized on Impaired Loans | 502 | 644 | 642
Commercial and construction | Commercial business |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Average Recorded Investment | 255 | 542 | 1,075
Interest Recognized on Impaired Loans | 10 | 17 | 62
Commercial and construction | Commercial real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Average Recorded Investment | 8,823 | 13,130 | 17,136
Interest Recognized on Impaired Loans | 337 | 456 | 478
Commercial and construction | Land |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Average Recorded Investment | 801 | 801 | 817
Interest Recognized on Impaired Loans |  |  |
Commercial and construction | Multi-family |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Average Recorded Investment | 1,710 | 1,842 | 2,176
Interest Recognized on Impaired Loans | 93 | 99 | 17
Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Average Recorded Investment | 1,529 | 1,947 | 3,187
Interest Recognized on Impaired Loans | $ 62 | $ 72 | $ 85

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