Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]: Realized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Details
Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment	$ (775)	$ 2,640
Equity Securities, FV-NI, Realized Gain (Loss)	(7)	0
Debt and Equity Securities, Realized Gain (Loss), Excluding Other-than-temporary Impairment	(782)	2,640
Equity Securities, FV-NI, Unrealized Gain (Loss)	(249)	(102)
Debt and Equity Securities, Gain (Loss)	(1,031)	2,538
Gain (Loss) on Sale of Other Investments	(2)	1
Gain (Loss) on Investments	$ (1,033)	$ 2,539