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12) Mortgage Servicing Rights: Assumptions used in determining MSR value (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Details
Prepayment Speeds	4.24%	3.67%
Average Life in Years of MSR	7.02	6.34
Discount Rate	9.51	10.01

X

- Definition

Represents the Average Life in Years of MSR, during the indicated time period.

+ References

No definition available.

+ Details

Name:	fil_AverageLifeInYearsOfMsr
Namespace Prefix:	fil_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the Discount Rate, during the indicated time period.

+ References

No definition available.

+ Details

Name:	fil_DiscountRate
Namespace Prefix:	fil_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the Prepayment Speeds, during the indicated time period.

+ References

No definition available.

+ Details

Name:	fil_PrepaymentSpeeds
Namespace Prefix:	fil_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_TextBlockAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration