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		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 12,860	$ 16,526	$ 17,181	$ 22,665
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(2,981)	848	(4,290)	2,010
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(5,286)		(9,320)	(7,087)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(296)	(619)	(764)	(1,673)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	7,442	16,134	7,442	16,134
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	3,145		4,635	(1,212)
Net impairment losses recognized in earnings
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(621)		(704)
Residential Mortgage Backed Securities Member
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	9,755	13,350	14,053	22,127
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(2,957)	399	(4,249)	1,070
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(5,286)		(9,320)	(7,087)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(287)	(632)	(749)	(1,698)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	4,370	12,969	4,370	12,969
Residential Mortgage Backed Securities Member | Net realized investment gains
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	3,145		4,635	(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		(148)		(231)
Commercial Mortgage Backed Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	576	533	570	538
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(5)	491	1	486
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	571	551	571	551
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)		(473)
US States and Political Subdivisions Debt Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2,529	2,643	2,558
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(19)	(42)	(42)	454
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(9)	13	(15)	25
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2,501	2,614	2,501	2,614
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases				$ 2,135