Investments (Schedule of Unrealized Loss on Investments) (Details) (USD $)	9 Months Ended
Sep. 30, 2013	Dec. 31, 2012
Investments [Abstract]
Aggregate Unrealized Losses, Less than one year	$ 146,609	$ 688,728
Aggregate Fair Value, Less than one year	37,646,607	22,887,686
Equity investment losses were considered to be other than temporary	$ 0

This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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