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21) Mortgage Servicing Rights: Assumptions used in determining MSR value (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Details |  |
Prepayment Speeds | 3.67% | 3.77%
Average Life in Years of MSR | 6.34 | 6.52
Discount Rate | 10.01% | 10.01%

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- Definition Represents the Average Life in Years of MSR, during the indicated time period. + References No definition available. + Details
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- Definition Represents the Prepayment Speeds, during the indicated time period. + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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