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Investments (Schedule Of Unrealized Loss On Investments) (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Investments [Abstract]
Aggregate Unrealized Losses, Less than one year	$ (721,967)	$ (2,578,990)
Aggregate Unrealized Losses, Greater than one year
Aggregate Fair Value, Less than one year	16,082,527	42,845,635
Aggregate Fair Value, Greater than one year

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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- Definition

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 twelve months or longer.

+ References+ Details