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3) Investments: Net carrying amount of held to maturity securities (Details) - Held-to-maturity Securities - USD ($) | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018
Net carrying amount for sales of securities | $ 662,972 | $ 2,432,180
Net realized loss related to sales of securities | $ 53,097 | $ 314,643

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- Definition Represents the monetary amount of Net carrying amount for sales of securities, during the indicated time period. + References No definition available. + Details
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Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the monetary amount of Net realized loss related to sales of securities, during the indicated time period. + References No definition available. + Details
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Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |