Investments (Details 2) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Summary of Investments in affiliates
Total	$ 37,235,530	$ 32,322,246
DFSC [Member]
Summary of Investments in affiliates
Total	36,770,530	31,857,246
Other [Member]
Summary of Investments in affiliates
Total	$ 465,000	$ 465,000