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		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	$ 228	$ 611	$ 636	$ 1,079
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	1	31	(208)	281
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	229	621	229	621
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Repayments And Amortization		(21)	(9)	(77)
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Unobservable Inputs Reconciliation				(189)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales			(415)	(432)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			225	(41)
Residential Mortgage Backed Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		391	408	864
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		27	(209)	83
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		397		397
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Repayments And Amortization		(21)	(9)	(77)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales			(415)	(432)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings			225	(41)
Commercial Mortgage Backed Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	228	220	228	215
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	1	4	1	198
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	229	224	229	224
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Unobservable Inputs Reconciliation				$ (189)