8. Fair Value: Fair Value, Assets Measured on Recurring Basis (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Loans held for sale	$ 12,583,544	$ 10,297,168
Loans held at fair value	5,182,526	4,450,901
Servicing asset	284,039	319,368
Thousand
Assets, Fair Value Disclosure	4,587,000	5,145,000
Loans held for sale	12,583,000	10,297,000
Loans held at fair value	5,183,000	4,451,000
Servicing asset	284,000	319,000
Thousand \| US Government Agencies Debt Securiities
Assets, Fair Value Disclosure	2,233,000	2,273,000
Thousand \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure	2,354,000	2,740,000
Thousand \| Money Market Funds
Assets, Fair Value Disclosure		132,000
Thousand \| Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure	0	132,000
Loans held for sale	0	0
Loans held at fair value	0	0
Servicing asset	0	0
Thousand \| Fair Value, Inputs, Level 1 \| US Government Agencies Debt Securiities
Assets, Fair Value Disclosure	0	0
Thousand \| Fair Value, Inputs, Level 1 \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure	0	0
Thousand \| Fair Value, Inputs, Level 1 \| Money Market Funds
Assets, Fair Value Disclosure		132,000
Thousand \| Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure	4,587,000	5,013,000
Loans held for sale	12,583,000	10,297,000
Loans held at fair value	0	0
Servicing asset	0	0
Thousand \| Fair Value, Inputs, Level 2 \| US Government Agencies Debt Securiities
Assets, Fair Value Disclosure	2,233,000	2,273,000
Thousand \| Fair Value, Inputs, Level 2 \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure	2,354,000	2,740,000
Thousand \| Fair Value, Inputs, Level 2 \| Money Market Funds
Assets, Fair Value Disclosure		0
Thousand \| Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure	0	0
Loans held for sale		0
Loans held at fair value	5,183,000	4,451,000
Servicing asset	284,000	319,000
Thousand \| Fair Value, Inputs, Level 3 \| US Government Agencies Debt Securiities
Assets, Fair Value Disclosure	0	0
Thousand \| Fair Value, Inputs, Level 3 \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure	$ 0	0
Thousand \| Fair Value, Inputs, Level 3 \| Money Market Funds
Assets, Fair Value Disclosure		$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

+ References

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196772

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Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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