Note 11. Stock Options: Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used (Policies)	3 Months Ended
Mar. 31, 2016
Policies
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used	The Company records share-based compensation expense for stock options based on the estimated fair value of the options on the date of grant using the Black-Scholes valuation model. The Company uses historical data among other factors to estimate the expected price volatility, the expected option term and the expected forfeiture rate. The risk-free rate is based on the U.S. Treasury yield curve in effect at the date of grant for the expected term of the option.

For each plan, identification of the award pricing model or other valuation method used in calculating the weighted average fair values disclosed. The model is also used to calculate the compensation expense that is shown within the balance sheet, income statement, and cash flow. Examples of valuation techniques are lattice models (binomial model), closed-form models (Black-Scholes-Merton formula), and a Monte Carlo simulation technique. Fair value is the amount at which an asset or liability could be bought or incurred or sold or settled in a current transaction between willing parties, that is, other than in a forced or liquidation sale. May include disclosures about the assumptions underlying application of the method selected.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsed
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration