8. Fair Value: Schedule of Fair Value of Assets Measured on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Assets, Fair Value, Nonrecurring	$ 7,308	$ 7,572
Fair Value, Inputs, Level 1
Assets, Fair Value, Nonrecurring	130	130
Fair Value, Inputs, Level 2
Assets, Fair Value, Nonrecurring	7,178	7,442
Fair Value, Inputs, Level 3
Assets, Fair Value, Nonrecurring	0	0
Impaired Loans, Carrying Value
Assets, Fair Value, Nonrecurring	708	479
Total fair value loss during the year	0	0
Impaired Loans, Carrying Value | Fair Value, Inputs, Level 1
Assets, Fair Value, Nonrecurring	0	0
Impaired Loans, Carrying Value | Fair Value, Inputs, Level 2
Assets, Fair Value, Nonrecurring	0	0
Impaired Loans, Carrying Value | Fair Value, Inputs, Level 3
Assets, Fair Value, Nonrecurring	708	479
Other Real Estate Owned
Assets, Fair Value, Nonrecurring	463	480
Total fair value loss during the year	0	39
Other Real Estate Owned | Fair Value, Inputs, Level 1
Assets, Fair Value, Nonrecurring	0	0
Other Real Estate Owned | Fair Value, Inputs, Level 2
Assets, Fair Value, Nonrecurring	0	0
Other Real Estate Owned | Fair Value, Inputs, Level 3
Assets, Fair Value, Nonrecurring	$ 463	$ 480