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13) Acquisitions: Unaudited pro forma (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Details |  |  |  |
ProForma Revenues | $ 61,332,289 | $ 56,529,818 | $ 116,184,523 | $ 103,859,760
ProForma Net Earnings | 2,799,245 | 3,593,272 | 4,832,511 | 5,256,652
ProForma Net Earnings per Class A equivalent common share | $ 0.25 | $ 0.36 | $ 0.44 | $ 0.55
ProForma Net Earnings per Class A equivalent common share assuming dilution | $ 0.24 | $ 0.34 | $ 0.41 | $ 0.54

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