Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]: Realized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Details
Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment	$ 895	$ (247)	$ 2,144	$ (442)
Equity Securities, FV-NI, Realized Gain (Loss)	0	(2)	0	(7)
Debt and Equity Securities, Realized Gain (Loss), Excluding Other-than-temporary Impairment	895	(249)	2,144	(449)
Equity Securities, FV-NI, Unrealized Gain (Loss)	35	266	412	114
Debt and Equity Securities, Gain (Loss)	930	17	2,556	(335)
Gain (Loss) on Sale of Other Investments	0	0	0	0
Gain (Loss) on Investments	$ 930	$ 17	$ 2,556	$ (335)