Note 4. Investments: Investments Classified by Contractual Maturity Date (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Available For Sale Securities Debt Maturities Excluding Mortgage backed Next Rolling Twelve Months Amortized Cost Basis	$ 8,608
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Next Rolling Twelve Months Fair Value	8,709
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Next Rolling Twelve Months Percent Fair Value	1.20%
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Two Through Five Amortized Cost Basis	127,101
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Two Through Five Fair Value	129,448
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Two Through Five Percent Fair Value	18.10%
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Six Through Ten Amortized Cost Basis	192,419
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Six Through Ten Fair Value	196,396
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling Year Six Through Ten Percent Fair Value	27.40%
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling After Year Ten Amortized Cost Basis	290,947
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling After Year Ten Fair Value	300,785
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Rolling After Year Ten Percent Fair Value	41.90%
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Amortized Cost Basis	619,075
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Securities Fair Value	635,338
Available For Sale Securities Debt Maturities Excluding Mortgagebacked Securities Percent Fair Value	88.60%
Available For Sale Securities Mortgagebacked Securities Fifteen Year Original Stated Maturity Amortized Cost Basis	37,633
Available For Sale Securities Mortgagebacked Securities Fifteen Year Original Stated Maturity Fair Value	42,008
Available For Sale Securities Mortgagebacked Securities Fifteen Year Original Stated Maturity Percent Fair Value	5.80%
Available For Sale Securities Mortgagebacked Securities Twenty Year Original Stated Maturity Amortized Cost Basis	492
Available For Sale Securities Mortgagebacked Securities Twenty Year Original Stated Maturity Fair Value	502
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	38,669
Available For Sale Securities Mortgagebacked Securities Thirty Year Original Stated Maturity Fair Value	39,310
Available For Sale Securities Mortgagebacked Securities Thirty Year Original Stated Maturity Percent Fair Value	5.50%
Available For Sale Debt Securities Amortized Cost Basis	695,869	829,250
Fixed maturities, available-for-sale	$ 717,158	$ 842,873
Available For Sale Securities Debt Securities Percent	100.00%