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Allowance For Loan Losses: Interest income foregone (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014
Details |  |  |
Interest income foregone on non-accrual loans | $ 112 | $ 433 | $ 949

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- Definition Represents the amount of interest income foregone during the indicated time period. + References No definition available. + Details
Name: | fil_InterestIncomeForegoneOnNonAccrualLoans
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TextBlockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration