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, 2019	Dec. 31, 2018
Details
Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment	$ 4,105	$ (775)
Equity Securities, FV-NI, Realized Gain (Loss)	(13)	(7)
Debt and Equity Securities, Realized Gain (Loss), Excluding Other-than-temporary Impairment	4,092	(782)
Equity Securities, FV-NI, Unrealized Gain (Loss)	613	(249)
Debt and Equity Securities, Gain (Loss)	4,705	(1,031)
Gain (Loss) on Sale of Other Investments	0	(2)
Gain (Loss) on Investments	$ 4,705	$ (1,033)