Note 6. Fair Value Disclosures: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 7,442	$ 16,134	$ 17,181	$ 22,665
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(2,157)	1,885	(6,447)	3,895
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(2,343)		(11,663)	(7,087)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(230)	(730)	(994)	(2,403)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	4,594	17,289	4,594	17,289
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases				2,135
Net realized investment gains
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	1,882		6,517	(1,212)
Net impairment losses recognized in earnings
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				(704)
Residential Mortgage Backed Securities Member
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	4,370	12,969	14,053	22,127
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(2,140)	1,906	(6,389)	2,976
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(2,343)		(11,663)	(7,087)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(220)	(733)	(969)	(2,431)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	1,549	14,142	1,549	14,142
Residential Mortgage Backed Securities Member | Net realized investment gains
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	1,882		6,517	(1,212)
Residential Mortgage Backed Securities Member | Net impairment losses recognized in earnings
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				(231)
Commercial Mortgage Backed Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	571	551	570	538
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	1	9	2	495
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	572	560	572	560
Commercial Mortgage Backed Securities | Net impairment losses recognized in earnings
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				(473)
US States and Political Subdivisions Debt Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2,501	2,614	2,558
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(18)	(30)	(60)	424
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(10)	3	(25)	28
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2,473	2,587	2,473	2,587
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases				$ 2,135