Note 4. Investments: Schedule of Unrealized Loss on Investments (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than 12 Months	30	14
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions More Than 12 Months	4	1
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	34	15
Corporate Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 20,856	$ 12,378
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	1,054	112
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	20,856	12,378
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	1,054	112
Foreign Government Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	490
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,327
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	125
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,817
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	126
Commercial Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	229	228
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	161	162
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	229	228
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	161	162
US Treasury Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,473
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	24
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,473
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	24
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	371
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	11
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	371
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	11
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	15,024	3,760
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	271	21
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,283
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	88
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	17,307	3,760
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	359	21
Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	38,214	16,138
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	1,361	133
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,839	228
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	374	162
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	42,053	16,366
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ 1,735	$ 295