6. Loans and Allowance for Loan Losses: Schedule of Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2017
Total
Impaired Financing Receivable, Unpaid Principal Balance	$ 1,302			$ 1,277
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,128			1,277
Impaired Financing Receivable, with Related Allowance, Recorded Investment	174			0
Impaired Financing Receivable, Recorded Investment	1,302			1,277
Impaired Financing Receivable, Related Allowance	31			0
Average Recorded Investment	1,305		$ 2,080
Interest recognized on impaired loans	0	$ 0
Commercial And Industrial
Impaired Financing Receivable, Unpaid Principal Balance	76			76
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	76			76
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0			0
Impaired Financing Receivable, Recorded Investment	76			76
Impaired Financing Receivable, Related Allowance	0			0
Average Recorded Investment	76		352
Interest recognized on impaired loans	0	0
Commercial And Industrial \| Commercial
Impaired Financing Receivable, Unpaid Principal Balance	0			0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0			0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0			0
Impaired Financing Receivable, Recorded Investment	0			0
Impaired Financing Receivable, Related Allowance	0			0
Average Recorded Investment	76		33
Interest recognized on impaired loans	0	0
Commercial And Industrial \| :S B A Loans
Impaired Financing Receivable, Unpaid Principal Balance	0			0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0			0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0			0
Impaired Financing Receivable, Recorded Investment	0			0
Impaired Financing Receivable, Related Allowance	0			0
Average Recorded Investment	0		0
Interest recognized on impaired loans	0	0
Commercial And Industrial \| Asset Based
Impaired Financing Receivable, Unpaid Principal Balance	76			76
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	76			76
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0			0
Impaired Financing Receivable, Recorded Investment	76			76
Impaired Financing Receivable, Related Allowance	0			0
Average Recorded Investment	0		319
Interest recognized on impaired loans	0	0
Commercial Real Estate Portfolio Segment
Impaired Financing Receivable, Unpaid Principal Balance	1,226			1,201
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,052			1,201
Impaired Financing Receivable, with Related Allowance, Recorded Investment	174			0
Impaired Financing Receivable, Recorded Investment	1,226			1,201
Impaired Financing Receivable, Related Allowance	31			0
Average Recorded Investment	1,229		1,728
Interest recognized on impaired loans	0	0
Commercial Real Estate Portfolio Segment \| :S B A Loans
Impaired Financing Receivable, Unpaid Principal Balance	78			81
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	78			81
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0			0
Impaired Financing Receivable, Recorded Investment	78			81
Impaired Financing Receivable, Related Allowance	0			0
Average Recorded Investment	79		254
Interest recognized on impaired loans	0	0
Commercial Real Estate Portfolio Segment \| Commercial Mortgages
Impaired Financing Receivable, Unpaid Principal Balance	964			933
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	790			933
Impaired Financing Receivable, with Related Allowance, Recorded Investment	174			0
Impaired Financing Receivable, Recorded Investment	964			933
Impaired Financing Receivable, Related Allowance	31			0
Average Recorded Investment	965		1,280
Interest recognized on impaired loans	0	0
Commercial Real Estate Portfolio Segment \| Religious Organizations
Impaired Financing Receivable, Unpaid Principal Balance	184			187
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	184			187
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0			0
Impaired Financing Receivable, Recorded Investment	184			187
Impaired Financing Receivable, Related Allowance	0			$ 0
Average Recorded Investment	185		$ 194
Interest recognized on impaired loans	$ 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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