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12) Mortgage Servicing Rights: Assumptions used in determining MSR value (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Details
Prepayment Speeds	4.01%	3.67%
Average Life in Years of MSR	6.92	6.34
Discount Rate	10.01%	10.01%

X

- Definition

Represents the AverageLifeInYearsOfMsr, during the indicated time period.

+ References

No definition available.

+ Details

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- Definition

Represents the PrepaymentSpeeds, during the indicated time period.

+ References

No definition available.

+ Details

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X

- 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

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- References

No definition available.

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