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