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Investment Securities: Gain Loss on Investments Policy (Details) (USD $) | 3 Months Ended
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Jun. 30, 2012
Gross gains on sales of available for sale securities | $ 2,100,000
Gross losses realized on sales of available for sale securities | $ 559,000

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | fil_GrossGainsOnSalesOfAvailableForSaleSecurities
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | fil_GrossLossesRealizedOnSalesOfAvailableForSaleSecurities
Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration