6. Loans and Allowance for Loan Losses: Schedule of Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Total
Impaired Financing Receivable, Unpaid Principal Balance	$ 1,511		$ 1,511		$ 1,277
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,435		1,435		1,277
Impaired Financing Receivable, with Related Allowance, Recorded Investment	76		76		0
Impaired Financing Receivable, Recorded Investment	1,511		1,511		1,277
Impaired Financing Receivable, Related Allowance	76		76		0
Average Recorded Investment	1,290	$ 2,032	1,288	$ 2,057
Interest recognized on impaired loans	1	0	3	0
Commercial And Industrial
Impaired Financing Receivable, Unpaid Principal Balance	152		152		76
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	76		76		76
Impaired Financing Receivable, with Related Allowance, Recorded Investment	76		76		0
Impaired Financing Receivable, Recorded Investment	152		152		76
Impaired Financing Receivable, Related Allowance	76		76		0
Average Recorded Investment	101	265	84	270
Interest recognized on impaired loans	0	0	2	0
Commercial And Industrial \| Commercial
Impaired Financing Receivable, Unpaid Principal Balance	76		76		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	76		76		0
Impaired Financing Receivable, Recorded Investment	76		76		0
Impaired Financing Receivable, Related Allowance	76		76		0
Average Recorded Investment	25	0	8	0
Interest recognized on impaired loans	0	0	2	0
Commercial And Industrial \| :S B A Loans
Impaired Financing Receivable, Unpaid Principal Balance	0		0		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0		0		0
Impaired Financing Receivable, Recorded Investment	0		0		0
Impaired Financing Receivable, Related Allowance	0		0		0
Average Recorded Investment	0	0	0	0
Interest recognized on impaired loans	0	0	0	0
Commercial And Industrial \| Asset Based
Impaired Financing Receivable, Unpaid Principal Balance	76		76		76
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	76		76		76
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0		0		0
Impaired Financing Receivable, Recorded Investment	76		76		76
Impaired Financing Receivable, Related Allowance	0		0		0
Average Recorded Investment	76	243	76	261
Interest recognized on impaired loans	0	0	0	0
Commercial Real Estate Portfolio Segment
Impaired Financing Receivable, Unpaid Principal Balance	1,359		1,359		1,201
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,359		1,359		1,201
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0		0		0
Impaired Financing Receivable, Recorded Investment	1,359		1,359		1,201
Impaired Financing Receivable, Related Allowance	0		0		0
Average Recorded Investment	1,189	1,789	1,204	1,796
Interest recognized on impaired loans	0	0	0	0
Commercial Real Estate Portfolio Segment \| :S B A Loans
Impaired Financing Receivable, Unpaid Principal Balance	72		72		81
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	72		72		81
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0		0		0
Impaired Financing Receivable, Recorded Investment	72		72		81
Impaired Financing Receivable, Related Allowance	0		0		0
Average Recorded Investment	73	245	76	249
Interest recognized on impaired loans	0	0	0	0
Commercial Real Estate Portfolio Segment \| Commercial Mortgages
Impaired Financing Receivable, Unpaid Principal Balance	1,108		1,108		933
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,108		1,108		933
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0		0		0
Impaired Financing Receivable, Recorded Investment	1,108		1,108		933
Impaired Financing Receivable, Related Allowance	0		0		0
Average Recorded Investment	936	1,355	946	1,355
Interest recognized on impaired loans	1	0	1	0
Commercial Real Estate Portfolio Segment \| Religious Organizations
Impaired Financing Receivable, Unpaid Principal Balance	179		179		187
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	179		179		187
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0		0		0
Impaired Financing Receivable, Recorded Investment	179		179		187
Impaired Financing Receivable, Related Allowance	0		0		$ 0
Average Recorded Investment	180	189	182	192
Interest recognized on impaired loans	$ 0	$ 0	$ 0	$ 0

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5258-111524

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