Note 4. Investments: Schedule of Unrealized Loss on Investments (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 14,558	$ 39,756
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	228	1,800
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	27,307	9,343
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	809	907
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	41,865	49,099
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	1,037	2,707
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than 12 Months	13	31
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions More Than 12 Months	22	9
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	35	40
Corporate Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,190	22,800
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	101	879
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	11,286	5,562
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	461	482
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	16,476	28,362
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	562	1,361
Foreign Government Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,777
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	47
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,328	1,279
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	102	166
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,105	1,279
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	149	166
Residential Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	641	742
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	2	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	641	742
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	2	3
Commercial Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	362	237
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	28	153
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	362	237
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	28	153
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,024	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	363
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,387	366
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	11	12
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,926	14,962
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	73	895
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	13,968	2,265
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	212	106
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	18,894	17,227
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	285	1,001
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
Nonredeemable Preferred Stock
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		393
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		393
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		$ 6