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Note 2: Investments in Securities: Certain investments in debt securities reported at less than historical cost (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Details |  |
Fair value investments reported less than historical cost | $ 89,700 | $ 104,500
Fair value investments reported less than historical cost percentage of investment portfolio | 50.00% | 48.80%

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- Definition Represents the monetary amount of Fair value investments reported less than historical cost, as of the indicated date. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Represents the Fair value investments reported less than historical cost percentage of investment portfolio, as of the indicated date. + References No definition available. + Details
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Namespace Prefix: | fil_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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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