Note 5. Fair Value Disclosures: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 3,481	$ 3,285	$ 3,267	$ 3,034
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Beginning Balance	1,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	34	4	289	286
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(22)	(18)	(63)	(49)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	3,493	3,271	3,493	3,271
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Ending Balance	2,179		2,179
Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Assumed			1,000
Gain On Sale Of Subsidiary To Joint Venture
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	1,281		1,281
Investment Income
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(102)		(102)
Contingent Liability Member
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Beginning Balance	1,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Ending Balance	2,179		2,179
Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Assumed			1,000
Contingent Liability Member | Gain On Sale Of Subsidiary To Joint Venture
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	1,281		1,281
Contingent Liability Member | Investment Income
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(102)		(102)
Commercial Mortgage Backed Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	1,233	906	953	593
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	45	18	325	331
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	1,278	924	1,278	924
US States and Political Subdivisions Debt Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2,248	2,379	2,314	2,441
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(11)	(14)	(36)	(45)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(22)	(18)	(63)	(49)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 2,215	$ 2,347	$ 2,215	$ 2,347