8. Fair Value: Fair Value, Assets Measured on Recurring Basis (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Loans held for sale	$ 10,468,182	$ 10,297,168
Loans held at fair value	4,849,036	4,450,901
Servicing asset	317,963	319,368
Thousand \| 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 \| Level 1 \| US Government Agencies Debt Securiities
Assets, Fair Value Disclosure	0	0
Thousand \| Level 1 \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure	0	0
Thousand \| Level 1 \| Money Market Funds
Assets, Fair Value Disclosure		132,000
Thousand \| Level 2
Assets, Fair Value Disclosure	4,831,000	5,013,000
Loans held for sale	10,468,000	10,297,000
Loans held at fair value	0	0
Servicing asset	0	0
Thousand \| Level 2 \| US Government Agencies Debt Securiities
Assets, Fair Value Disclosure	2,252,000	2,273,000
Thousand \| Level 2 \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure	2,579,000	2,740,000
Thousand \| Level 2 \| Money Market Funds
Assets, Fair Value Disclosure		0
Thousand \| Level 3
Assets, Fair Value Disclosure	0	0
Loans held for sale	0	0
Loans held at fair value	4,849,000	4,451,000
Servicing asset	318,000	319,000
Thousand \| Level 3 \| US Government Agencies Debt Securiities
Assets, Fair Value Disclosure	0	0
Thousand \| Level 3 \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure	0	0
Thousand \| Level 3 \| Money Market Funds
Assets, Fair Value Disclosure		0
Thousand
Assets, Fair Value Disclosure	4,831,000	5,145,000
Loans held for sale	10,468,000	10,297,000
Loans held at fair value	4,849,000	4,451,000
Servicing asset	318,000	319,000
Thousand \| US Government Agencies Debt Securiities
Assets, Fair Value Disclosure	2,252,000	2,273,000
Thousand \| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure	$ 2,579,000	2,740,000
Thousand \| Money Market Funds
Assets, Fair Value Disclosure		$ 132,000

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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