6. Loans and Allowance For Loan Losses: Schedule of Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Average Recorded Investment	$ 2,032	$ 2,079	$ 2,057	$ 2,462
Interest recognized on impaired loans	0	1	0	8
Commercial And Industrial
Average Recorded Investment	243	437	261	437
Interest recognized on impaired loans	0	0	0	0
Commercial Real Estate Portfolio Segment
Average Recorded Investment	1,789	1,642	1,796	2,025
Interest recognized on impaired loans	0	1	0	8
SBA Loans | Commercial And Industrial
Average Recorded Investment	0	39	0	39
Interest recognized on impaired loans	0	0	0	0
SBA Loans | Commercial Real Estate Portfolio Segment
Average Recorded Investment	245	162	249	304
Interest recognized on impaired loans	0	0	0	3
Asset Based Loans | Commercial And Industrial
Average Recorded Investment	243	398	261	398
Interest recognized on impaired loans	0	0	0	0
Commercial Mortgages | Commercial Real Estate Portfolio Segment
Average Recorded Investment	1,355	1,280	1,355	1,422
Interest recognized on impaired loans	0	1	0	5
Religious Organizations | Commercial Real Estate Portfolio Segment
Average Recorded Investment	189	200	192	299
Interest recognized on impaired loans	$ 0	$ 0	$ 0	$ 0