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20. Riverview Bancorp, Inc. (Parent Company): Schedule of Parent Company Income Statement (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2011
Other | $ 35 | $ (297) | $ 769
Parent Company |  |  |
Interest Income, Securities, US Treasury and Other US Government | 20 | 40 | 44
Interest income on loan receivable from subsidiary bank | 50 | 59 | 68
Other | 70 | 99 | 112
Management service fees paid to subsidiary bank | 143 | 142 | 143
Other Expenses | 685 | 3,624 | 1,316
Operating Expenses | 828 | 3,766 | 1,459
Income (Loss) Before Income Taxes and Equity in Undistributed Income (Loss) of Subsidiary Bank | (758) | (3,667) | (1,347)
Provision (Benefit) for Income Taxes | (258) | 81 | (458)
Income (Loss) Attributable to Parent | (500) | (3,748) | (889)
Undistributed Earnings of Domestic Subsidiaries | 3,133 | (27,909) | 5,204
Net Income (Loss) Attributable to Parent, Diluted | $ 2,633 | $ (31,657) | $ 4,315

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