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5) Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Details        
Net earnings $ 2,485,864 $ 5,017,006 $ 4,345,864 $ 7,554,947
Weighted-average Class A equivalent common share outstanding (1) 15,161,689 14,747,976 15,110,119 14,702,187
GrantOfEmployeeStockOptions $ 330,588 $ 363,348 $ 344,388 $ 412,348
Diluted weighted-average shares outstanding 15,492,277 15,111,324 15,454,507 15,114,535
Net earnings per Class A Equivalent common share (1) $ 0.16 $ 0.34 $ 0.29 $ 0.51
Net earnings per Class A Equivalent common share-assuming dilution (1) $ 0.16 $ 0.33 $ 0.28 $ 0.50