Note 5. Investments: Schedule of Unrealized Loss on Investments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 39,756	$ 16,138
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	1,800	133
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	9,343	228
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	907	162
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	49,099	16,366
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	2,707	295
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than 12 Months	31	14
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions More Than 12 Months	9	1
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	40	15
Corporate Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	22,800	12,378
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	879	112
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	5,562
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	482
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	28,362	12,378
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	1,361	112
Foreign Government Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,279
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	166
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,279
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	166
Residential Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	742
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	742
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	3
Commercial Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	237	228
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	153	162
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	237	228
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	153	162
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
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	366
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	12
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	366
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	12
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	14,962	3,760
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	895	21
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,265
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	106
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	17,227	3,760
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	1,001	21
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