Note 4. Investments: Schedule of Unrealized Loss on Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 33,255	$ 39,756
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	935	1,800
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	10,432	9,343
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	677	907
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	43,687	49,099
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	1,612	2,707
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than 12 Months	27	31
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions More Than 12 Months	10	9
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	37	40
Corporate Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	16,071	22,800
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	432	879
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	6,606	5,562
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	454	482
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	22,677	28,362
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	886	1,361
Foreign Government Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,305	1,279
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	133	166
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,305	1,279
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	133	166
Residential Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	681	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	681	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	348	237
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	42	153
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	348	237
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	42	153
US Treasury Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	494	493
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	5	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	494	493
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	5	5
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	366	366
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	8	12
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	366	366
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	8	12
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	15,643	14,962
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	486	895
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,173	2,265
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	48	106
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	17,816	17,227
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	534	1,001
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