Note 4. Investments: Investments Classified by Contractual Maturity Date (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Available For Sale Securities Debt Maturities Excluding Mortgage backed Next Rolling Twelve Months Amortized Cost Basis	$ 5,164
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Next Rolling Twelve Months Fair Value	5,254
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Next Rolling Twelve Months Percent Fair Value	0.70%
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Two Through Five Amortized Cost Basis	123,053
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Two Through Five Fair Value	126,407
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Two Through Five Percent Fair Value	17.20%
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Six Through Ten Amortized Cost Basis	214,055
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Six Through Ten Fair Value	220,422
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Six Through Ten Percent Fair Value	29.90%
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling After Year Ten Amortized Cost Basis	295,056
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling After Year Ten Fair Value	306,397
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling After Year Ten Percent Fair Value	41.60%
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Amortized Cost Basis	637,328
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Securities Fair Value	658,480
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Securities Percent Fair Value	89.40%
Available For Sale Securities Mortgagebacked Securities Fifteen Year Original Stated Maturity Amortized Cost Basis	32,053
Available For Sale Securities Mortgagebacked Securities Fifteen Year Original Stated Maturity Fair Value	38,539
Available For Sale Securities Mortgagebacked Securities Fifteen Year Original Stated Maturity Percent Fair Value	5.20%
Available For Sale Securities Mortgagebacked Securities Twenty Year Original Stated Maturity Amortized Cost Basis	483
Available For Sale Securities Mortgagebacked Securities Twenty Year Original Stated Maturity Fair Value	497
Available For Sale Securities Mortgagebacked Securities Twenty Year Original Stated Maturity Percent Fair Value	0.10%
Available For Sale Securities Mortgagebacked Securities Thirty Year Original Stated Maturity Amortized Cost Basis	38,236
Available For Sale Securities Mortgagebacked Securities Thirty Year Original Stated Maturity Fair Value	39,068
Available For Sale Securities Mortgagebacked Securities Thirty Year Original Stated Maturity Percent Fair Value	5.30%
Available For Sale Debt Securities Amortized Cost Basis	708,100	829,250
Fixed maturities, available-for-sale	$ 736,584	$ 842,873
Available For Sale Securities Debt Securities Percent	100.00%