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13) Acquisitions: Unaudited pro forma (Details) (USD $) | 9 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
ProForma Revenues | $ 167,607,664 | $ 112,007,699 | $ 128,705,498
ProForma Net Earnings | 9,246,699 | 457,254 | (3,319)
ProForma Net Earnings per Class A equivalent common share | $ 0.97 | $ 0.05 |
ProForma Net Earnings per Class A equivalent common share assuming dilution | $ 0.97 | $ 0.05 |

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