Note 12. Stockholders' Equity: Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net realized investment gains									$ 3,094	$ 7,688	$ 19,750
Net impairment losses recognized in earnings									228
Income (loss) before income taxes									48,188	23,312	23,654
Income taxes (benefits)									17,666	6,391	8,398
Net income (loss)	$ 5,147	$ 14,888	$ 5,156	$ 5,331	$ 4,212	$ 4,824	$ 3,880	$ 4,005	30,522	16,921	15,256
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Unrealized Investment Gain (Loss)
Net realized investment gains									5,202	7,637	17,841
Net impairment losses recognized in earnings									228
Income (loss) before income taxes									4,974	7,637	17,841
Income taxes (benefits)									1,768	2,386	6,015
Net income (loss)									$ 3,206	$ 5,251	$ 11,826