Income Taxes: Reconciliation of unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning of Period	$ 1,623	$ 2,443
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	888	434
Reductions for prior year tax positions	(247)	(1,254)
Additions for current year tax positions	0	0
End of Period	2,264	$ 1,623
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 700