Note 5. Investments: Schedule of Unrealized Loss on Investments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than 12 Months	14	15
Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions More Than 12 Months	1	5
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	15	20
Corporate Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	12,378	8,538
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	112	57
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,154
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		9
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	12,378	9,692
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	112	66
Commercial Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	228	215
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	162	364
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	228	215
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	162	364
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3,760	576
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	21	12
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	3,760	576
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	21	12
Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	16,138	11,961
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	133	112
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	228	2,127
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	162	416
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	16,366	14,088
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	295	528
Residential Mortgage Backed Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		348
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		40
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		348
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		40
US Government-sponsored Enterprises Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		2,847
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		43
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		410
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		3,257
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		46
COMMON STOCK
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		446
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		22
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		446
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		22
Equity Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		446
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		22
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		446
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		22