Income Taxes: Tax Benefit Related to Legal Restructuring (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Deferred Tax Assets, Goodwill and Intangible Assets	$ 49,000
Deferred income taxes	(14,396)	$ 65,536
Other Restructuring
Deferred income taxes	$ 49,000