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6) Earnings Per Share: Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share Table Text Block (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Details        
Net earnings $ 1,266,491 $ 3,990,046 $ 6,099,002 $ 9,245,262
Weighted-average Class A equivalent common share outstanding (1) 11,307,249 10,104,202 11,097,776 10,059,548
GrantOfEmployeeStockOptions $ 520,803 $ 896,570 $ 568,904 $ 13,404
Pro Forma Weighted Average Shares Outstanding, Diluted 520,803 896,570 568,904 13,404
Weighted-average Class A equivalent common shares outstanding-assuming dilution (1) 11,828,052 11,000,772 11,666,680 10,072,952
Net earnings per Class A Equivalent common share (1) $ 0.11 $ 0.39 $ 0.55 $ 0.92
Net earnings per Class A Equivalent common share-assuming dilution (1) $ 0.11 $ 0.36 $ 0.52 $ 0.92