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12) Mortgage Servicing Rights: Assumptions used in determining MSR value (Details) - Decimal | 6 Months Ended | 12 Months Ended
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Jun. 30, 2020 | Dec. 31, 2019
Text Block [Abstract] |  |
Prepayment Speeds | 18.9 | 15.30
Average Life in Years of MSR | 4 years 6 months 25 days | 5 years 3 months 8 days
Discount Rate | 9.51 | 9.51

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