Note 6. Fair Value Measurements: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 885
Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Assumed	1,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(115)
Contingent Liability
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	885
Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Assumed	1,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(115)
Fair Value, Inputs, Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	478	$ 381	$ 237
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	127	144
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(30)
Commercial Mortgage Backed Securities
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	478	381	$ 237
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	127	$ 144
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	$ (30)