Note 5. Investments: Schedule of Unrealized Loss on Investments (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 27,705	$ 14,342
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	294	184
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	16,740	23,188
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	444	585
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	44,445	37,530
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ 738	$ 769
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than 12 Months	21	11
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions More Than 12 Months	15	22
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	36	33
Corporate Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 9,268	$ 6,101
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	175	83
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	11,536	14,087
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	307	355
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	20,804	20,188
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	482	438
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	18,437	3,691
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	119	61
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	5,139	6,448
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	136	151
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	23,576	10,139
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	255	212
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	65	351
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	1	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	65	351
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ 1	7
Foreign Government Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		4,550
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		40
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,355
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		61
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		5,905
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		101
Residential Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		566
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		566
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		2
Commercial Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		381
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		9
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		381
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		$ 9