Note 6. Fair Value Measurements: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2012 Residential Mortgage Backed Securities	Jun. 30, 2013 Residential Mortgage Backed Securities	Jun. 30, 2012 Residential Mortgage Backed Securities	Jun. 30, 2013 Commercial Mortgage Backed Securities	Jun. 30, 2012 Commercial Mortgage Backed Securities	Jun. 30, 2012 Commercial Mortgage Backed Securities	Dec. 31, 2012 Commercial Mortgage Backed Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 230	$ 610	$ 636	$ 1,079	$ 397	$ 408	$ 864	$ 230	$ 213	$ 215	$ 228
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(2)	208	(209)	251	12	(209)	57	(2)	196	194
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	228	611	228	611	391		391	228	220	220	228
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Repayments And Amortization		(18)	(9)	(57)	(18)	(9)	(57)
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Unobservable Inputs Reconciliation		(189)		(189)					(189)	(189)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales			(415)	(432)		(415)	(432)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			$ 225	$ (41)		$ 225	$ (41)