6. Loans and Allowance For Loan Losses: Schedule of Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Average Recorded Investment	$ 2,062	$ 2,251	$ 2,070	$ 1,985
Interest recognized on impaired loans	0	7	0	18
Commercial And Industrial
Average Recorded Investment	265	437	270	437
Interest recognized on impaired loans	0	3	0	0
Commercial Real Estate Portfolio Segment
Average Recorded Investment	1,797	1,814	1,800	1,548
Interest recognized on impaired loans	0	4	0	18
Commercial | Commercial And Industrial
Average Recorded Investment	0	109	10	109
Interest recognized on impaired loans	0	0	0	0
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	250	264	252	103
Interest recognized on impaired loans	0	0	0	5
Asset Based Loans | Commercial And Industrial
Average Recorded Investment	265	289	260	289
Interest recognized on impaired loans	0	3	0	0
Commercial Mortgages | Commercial Real Estate Portfolio Segment
Average Recorded Investment	1,355	1,308	1,355	1,097
Interest recognized on impaired loans	0	4	0	13
Religious Organizations | Commercial Real Estate Portfolio Segment
Average Recorded Investment	192	242	193	348
Interest recognized on impaired loans	$ 0	$ 0	$ 0	$ 0