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13) Acquisitions: Unaudited pro forma (Details) (USD $) | 3 Months Ended
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Mar. 31, 2013 | Mar. 31, 2012
Details |  |
ProForma Revenues | $ 54,852,234 | $ 47,323,230
ProForma Net Earnings | 2,033,266 | 1,662,185
ProForma Net Earnings per Class A equivalent common share | $ 0.19 | $ 0.17
ProForma Net Earnings per Class A equivalent common share assuming dilution | $ 0.17 | $ 0.16

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