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12) Mortgage Servicing Rights: Summary of Unpaid Principal Balances of the Servicing Portfolio (Details) - USD ($) | Mar. 31, 2018 | Dec. 31, 2017
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Details |  |
Servicing Unpaid Principal Balance | $ 2,941,337,111 | $ 2,924,868,843

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Namespace Prefix: | fil_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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