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Business Description And Significant Accounting Policies: Anti-dilutive shares (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share      
Outstanding securities not included in the computation of diluted earnings per share (in shares) 16 11 3
Equity Compensation      
Antidilutive Securities Excluded from Computation of Earnings Per Share      
Outstanding securities not included in the computation of diluted earnings per share (in shares) 16 11 3