Note 4. Investments: Schedule of Unrealized Loss on Investments (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 25,104	$ 39,756
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	381	1,800
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	28,614	9,343
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	828	907
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	53,718	49,099
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	1,209	2,707
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than 12 Months	20	31
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions More Than 12 Months	23	9
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	43	40
Corporate Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	11,250	22,800
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	180	879
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	12,873	5,562
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	502	482
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	24,123	28,362
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	682	1,361
Foreign Government Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,644
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	95
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,340	1,279
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	83	166
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,984	1,279
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	178	166
Residential Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	600	742
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	4	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	600	742
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	4	3
Commercial Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	370	237
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	20	153
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	370	237
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	20	153
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	6,187	14,962
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	96	895
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	13,676	2,265
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	215	106
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	19,863	17,227
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	311	1,001
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,025	366
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	5	12
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	355
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,380	366
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	13	12
Nonredeemable Preferred Stock
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	398	393
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	1	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	398	393
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	1	6
US Treasury Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		493
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		493
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		$ 5