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13) Acquisitions: Unaudited pro forma (Details) (USD $)
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Details    
ProForma Revenues $ 166,737,314 $ 167,607,664
ProForma Net Earnings 6,099,002 9,246,699
ProForma Net Earnings per Class A equivalent common share $ 0.55 $ 0.92
ProForma Net Earnings per Class A equivalent common share assuming dilution $ 0.52 $ 0.92