Note 3. Investment Securities: Realized Gain (Loss) on Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Available for sale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments	$ 3,877	$ 11,889	$ 6,063	$ 16,453
Trading Securities, Realized Gain (Loss)	25	349	30	385
Other Realized Gain (Loss) Excluding Other Than Temporary Impairments	134	(415)	(575)	(654)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	4,036	11,823	5,518	16,184
Trading Securities, Change in Unrealized Holding Gain (Loss)	483	(88)	552	170
Marketable Securities, Unrealized Gain (Loss), Excluding Other than Temporary Impairments	483	(88)	552	170
Net realized investment gains	4,519	11,735	6,070	16,354
Debt Securities
Available for sale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments	3,882	11,825	6,068	16,276
Preferred Stock
Available for sale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments	$ (5)	$ 64	$ (5)	$ 177